Polyester and Nylon Webbing Compared

Polyester and nylon are the two most common synthetic fibres used in equestrian webbing. Both can produce strong, durable and well-finished tapes, yet they are not equivalent materials. The choice affects stretch, handling, water behaviour, dimensional stability, resistance to sunlight and chemicals, comfort, sewing performance and the way a product behaves when it is suddenly loaded.

For horse owners, the distinction is most relevant in headcollars, lead ropes, breastplates, breastgirths, surcingles, rug straps, girths, luggage and yard equipment. For manufacturers and trade professionals, it also affects yarn selection, weave design, dyeing, finishing, stitching, hardware compatibility and product testing.

A crucial qualification is that “polyester webbing” or “nylon webbing” describes only the principal fibre. Finished performance also depends on yarn tenacity, yarn size, weave, density, width, thickness, edge construction, coating, dyeing, stitching, hardware and the service environment. A high-quality nylon webbing may outperform a poorly made polyester webbing in one application, while a well-designed polyester assembly may be the more appropriate choice in another.

What webbing is

Webbing is a narrow woven textile. Its warp yarns run lengthwise and its weft yarns pass across the width. The weave may be plain, twill, herringbone, tubular, pebble or another construction selected for flexibility, thickness, stability, abrasion resistance or appearance. The yarn is usually made from continuous filaments or spun fibres.

Webbing is not the same as rope. Rope is generally a round or near-round structure in which yarns or strands are twisted or braided; webbing is a flat or tubular woven structure. Neither is automatically safer. The suitable form depends on the product design, the direction of loading, the need for adjustment, the interaction with buckles and the consequences of failure.

Stable and recovery rugs serve a different purpose from turnout rugs: insulation and moisture management matter more than waterproofing. Readers can compare current fleece and cooler rug options from JSM Equestrian Supplies alongside the principles discussed here.

Manufacturers may apply finishes that alter handling or surface behaviour. These can include stiffening agents, water-repellent treatments, coatings, anti-static finishes, pigment systems, mildew-resistant treatments and special edge constructions. Consequently, a fibre comparison should be treated as a starting point rather than a complete product specification. Webbing manufacturers commonly describe weave, finish, width and thickness as separate design variables. Webbing Products’ technical overview provides an example of this approach.

The fibres in simple terms

Polyester

In commercial webbing, polyester normally means polyethylene terephthalate, often abbreviated to PET. It is a thermoplastic synthetic fibre with comparatively low moisture absorption, good dimensional stability and generally strong resistance to outdoor exposure.

Polyester webbing is usually selected where low elongation, resistance to wet conditions and retention of strength during outdoor use are important. It is widely used in load-restraint webbing, outdoor equipment, safety harness webbing, bags and many forms of equestrian tack.

Nylon

Nylon is a family of polyamide fibres. Nylon webbing is valued for high toughness, good abrasion resistance and greater elastic elongation than polyester. It is often chosen where flexibility, impact tolerance or a degree of energy absorption is useful.

Nylon is more hygroscopic than polyester: it takes up more moisture from the atmosphere and can absorb water when wetted. This affects weight, dimensions, feel and mechanical behaviour. It does not mean that nylon is unsuitable for wet conditions, but it does mean that its wet-state performance and drying regime deserve attention.

Comparison at a glance

Property	Polyester webbing	Nylon webbing	Practical relevance in equestrian use
Stretch and elongation	Generally lower elongation	Generally higher elongation and recovery	Polyester gives a more stable feel; nylon can feel more forgiving under a sudden load.
Moisture absorption	Low	Higher	Polyester tends to dry and remain dimensionally stable more readily.
Wet-state behaviour	Usually comparatively stable	Water uptake can alter strength, stiffness and dimensions	Important for turnout, washing, wet leading and equipment stored damp.
UV resistance	Generally very good, subject to yarn, dye and finish	Variable and often less forgiving than polyester in prolonged exposure	Important for permanently outdoor headcollars, trailer fittings and yard equipment.
Abrasion and toughness	Good abrasion resistance	Very good toughness and abrasion resistance	Neither fibre should be judged without considering weave and edge wear.
Feel	Can feel firmer or crisper	Often softer and more supple	Relevant to comfort, adjustment and handling.
Dimensional stability	Usually strong	More affected by moisture and heat history	Relevant to fit, buckle adjustment and repeated washing.
Heat behaviour	Thermoplastic; high-temperature exposure can melt or weaken it	Thermoplastic; high-temperature exposure can melt or weaken it	Do not expose either fibre to uncontrolled heat, hot exhausts or flame.
Typical design advantage	Stable, low-stretch, outdoor-oriented performance	Tough, flexible, higher-energy absorption potential

The table describes broad tendencies, not universal rankings. Fibre grade, construction and finishing can narrow or reverse apparent differences in a particular product.

Strength is not the same as breaking load

“Strong” is used loosely in product descriptions. In technical work, several different properties may be relevant:

• Breaking force is the force at which a specimen fails in a specified test.
• Elongation at break is the extension recorded when failure occurs.
• Working load or safe working load is a design or application limit, not the breaking force.
• Tear strength concerns resistance to a cut, nick or tear propagating through the textile.
• Seam strength concerns the sewn joint and may be lower than the strength of the webbing itself.
• Hardware strength concerns buckles, rings, snaps, sliders and attachment points.

A wide, dense webbing with a high breaking force can still form an unsafe product if the bar-tack is poorly placed, the fold-back is too short, the thread is unsuitable, the buckle is weak or a sharp edge cuts the webbing. For this reason, a manufacturer’s claim about raw webbing should not be interpreted as a claim about the strength of a finished headcollar or lead rope.

ISO 13934-1 specifies a strip method for determining maximum force and elongation of textile fabrics, including testing in dry and wet states. It is a test method, not a universal performance rating for every equestrian product. Results are meaningful only when specimen preparation, conditioning, test direction and reporting are understood. ISO 13934-1:2013 was confirmed as current in 2024. Seam tests are separate: ISO 13935-2 addresses the maximum force required to rupture a sewn seam using a grab method. The result from a webbing test should not simply be substituted for the result from a seam test.

Stretch, shock and control

Nylon generally elongates more than polyester under load. This can be beneficial where a product must tolerate a sudden transient force without behaving as a completely rigid connection. It can also make a lead rope or restraint feel less abrupt in the hand.

However, stretch is not automatically a safety feature. In a lead rope, excessive extension may delay the handler’s response or increase the distance available for a horse to accelerate. In a breastplate or girth attachment, unwanted elongation may alter fit. In a trailer or lorry restraint, movement may be undesirable. In a component intended to release or break under a specified circumstance, stretch may also change the loading sequence.

Polyester’s lower elongation is useful where dimensional stability and reduced movement are priorities. This is one reason polyester is common in load-restraint and tie-down applications. UK government guidance on load securing emphasises that webbing can be damaged by sharp edges, weather, oil and dirt, and should be protected and stored dry; the advice is relevant to equestrian transport equipment even when the webbing is not used for a commercial freight load. DVSA guidance on lashing straps also warns that straps are vulnerable to damage and require inspection.

Neither fibre should be described as an “energy absorber” merely because it stretches. Genuine energy-absorbing webbing uses a designed construction, such as controlled tearing, and must be treated as a specialist engineered component rather than ordinary nylon or polyester tape.

Moisture and wet use

Polyester absorbs relatively little water. It therefore tends to retain its dimensions and handling characteristics more consistently after rain or washing. It is also less likely to remain waterlogged. This is useful for outdoor headcollars, rug straps, turnout accessories, trailer equipment and yard products exposed to repeated wetting.

Nylon absorbs more moisture. Wet nylon may feel heavier, softer or less crisp, and drying can take longer depending on yarn size, weave and finish. Its wet strength behaviour depends on the specific nylon type and construction, so broad statements such as “nylon loses strength when wet” should not be treated as a complete specification. The correct question is whether the finished product has been tested for the wet conditions in which it will be used.

Wetness is rarely the only concern. Mud and grit can enter the weave, act as an abrasive, retain moisture against metal hardware and make inspection more difficult. Sweat, urine, stable disinfectants, detergents and salt can also affect a product over time. Regular cleaning with a method compatible with the manufacturer’s instructions is more useful than assuming one fibre is immune to deterioration.

Ultraviolet exposure and outdoor life

Sunlight, particularly ultraviolet radiation, can embrittle or weaken synthetic fibres over time. Polyester is generally regarded as the stronger choice for prolonged outdoor exposure, and technical webbing suppliers commonly specify polyester for UV-exposed load restraint, outdoor and safety applications. Their documentation also distinguishes polyester’s low water absorption and UV resistance from nylon’s higher elongation. See, for example, the technical information for lifting and recovery webbing.

That does not make all polyester webbing permanently weatherproof. UV resistance varies with polymer quality, pigment, stabilisers, dyeing process, exposure intensity, webbing thickness and whether the webbing is covered or shaded. Darkening, fading, surface fuzz, stiffness, loss of flexibility and brittle edges can all be warning signs, but visible appearance alone cannot quantify retained strength.

Nylon can perform well outdoors when correctly formulated and finished, but prolonged direct sunlight is a more significant selection issue. A nylon headcollar kept in a tack room and used occasionally is in a different exposure category from a nylon strap left permanently on a gate, trailer or field shelter.

Abrasion, cuts and surface damage

Both fibres can provide good abrasion resistance. Nylon is often associated with toughness and impact resistance, while polyester is often selected for stable outdoor performance and resistance to water and UV. In practice, the weave may matter as much as the polymer.

A dense, compact weave can resist snagging and surface wear better than a loose, soft construction. Tubular webbing may protect internal yarns from some contact but can be damaged by crushing or localised cutting. A stiff finish may improve threading through a buckle but can reduce suppleness. A rough ring, buckle tongue, sharp edge or poorly aligned slider can abrade either fibre.

Inspection should focus on:

• frayed or feathered edges;
• cuts, nicks and pulled warp yarns;
• local thinning or glazing;
• hard, shiny areas caused by friction or heat;
• unusual stiffness, brittleness or loss of flexibility;
• discolouration associated with chemicals, sunlight or heat;
• loose stitching, broken bar-tacks and thread abrasion;
• distorted rings, cracked buckles or damaged snap hooks.

A nick can be more serious than general surface fluff because it concentrates stress in a small area. Webbing used around metal hardware deserves particular attention: the bend radius, contact pressure and movement at the attachment point can determine service life.

Heat and chemical exposure

Both nylon and polyester are thermoplastic fibres. They can soften, shrink, melt or lose strength when exposed to excessive heat. A hot iron, flame, welding spark, heater, exhaust component or uncontrolled drying temperature can damage webbing even when the damage is not immediately obvious.

Polyester is commonly valued for resistance to water, mildew and a range of contaminants. Nylon also has useful chemical resistance, but the exact result depends on the chemical, concentration, temperature, exposure time and stress state of the fibre. Acids, alkalis, solvents, oils, disinfectants and cleaning products should not be treated as interchangeable hazards.

Where a product is likely to contact stable disinfectants, agricultural chemicals or oils, the manufacturer should be asked for compatibility information. A claim such as “chemical resistant” is incomplete unless it identifies the relevant chemicals and test conditions.

Comfort and handling

Nylon often has a softer, more supple hand, which can be attractive in products handled frequently or worn close to the horse. Polyester can feel firmer, crisper or more structured, although finishing and weave can change this substantially.

Comfort is not determined by fibre alone. Edge binding, width, thickness, seam placement, hardware, lining and the presence of dirt or dried sweat may have greater direct effect on the horse. A soft webbing can still cause rubbing if it is too narrow, badly positioned or combined with a rigid buckle. Conversely, a firmer polyester webbing can be comfortable when broad, smooth-edged and correctly fitted.

Colour, dyeing and appearance

Both fibres can be produced in a wide range of colours. Colourfastness depends on the fibre, dye system, pigment, finishing process, washing, UV exposure and contamination. Fading is not a reliable measure of retained strength, but marked fading alongside brittleness or surface damage should prompt replacement.

Reflective, fluorescent or printed webbing introduces additional considerations. A reflective strip or print can wear before the structural webbing does, and a visually bright product is not necessarily a certified visibility or safety product. If visibility is important for road use, the complete product should be selected for that purpose rather than relying on colour alone. The Highway Code advises riders to ensure tack is well fitted and in good condition before going on the road. The Highway Code, Rule 52 is a useful general reference.

Application-specific selection

Headcollars and lead ropes

Polyester is often a sensible choice for an everyday headcollar exposed to rain, mud and sunlight because of its low moisture absorption and outdoor stability. Nylon may be preferred where a softer hand and greater flexibility are priorities. The choice should still be subordinate to correct fit, buckle quality, stitching and the intended behaviour if the horse becomes caught.

UK welfare guidance states that a headcollar should be correctly fitted, checked and made from a material that can break easily if the horse becomes caught. This is a design and welfare requirement, not an argument that nylon or polyester is universally safer. The UK Code of Practice for the Welfare of Horses should be read alongside the product maker’s instructions.

Breastplates, breastgirths and girths

Fit, adjustment range and load distribution are critical. Low-stretch polyester can help a product retain its adjustment, while nylon may offer a more flexible feel. Neither material compensates for poor design or concentrated loading at a stitched loop. Inspect attachment points and areas passing through rings especially carefully.

Rugs and surcingles

Outdoor exposure and repeated wetting generally favour polyester, particularly where the webbing is exposed on a turnout rug. Nylon can be appropriate for indoor or intermittent use, but moisture absorption, drying and UV exposure should be considered. Buckles and elastic sections may fail before the webbing.

Trailer and lorry equipment

For tie-downs and load restraint, low elongation and resistance to outdoor exposure make polyester common. The complete restraint must be suitable for the load, attachment points and relevant operating instructions. A general-purpose equestrian strap must not be assumed to have the performance or certification of a regulated load-restraint assembly.

Safety-related equipment

Where webbing forms part of a body protector, fall-arrest system, riding safety device or other life-safety product, fibre preference is secondary to the applicable product standard, conformity assessment, traceability and system testing. A length of high-strength webbing is not automatically a certified safety component.

Quality indicators for buyers and manufacturers

Useful questions include:

1. Is the fibre identified clearly as polyester, polyamide/nylon or a blend?
2. Are width, thickness, construction and breaking force specified?
3. Were tests conducted on the webbing or on the finished assembly?
4. Are dry and wet results distinguished where wet use is expected?
5. Is the product intended for load bearing, restraint, adjustment or decoration?
6. Are stitching pattern, thread, fold-back length and hardware specified?
7. Are cleaning, storage, UV exposure and replacement instructions provided?
8. Is there batch traceability or a documented quality-control system?

For manufacturers, the critical control point is the assembly. Webbing width must match the buckle and keeper; stitch geometry must suit the load direction; thread must tolerate the environment; edges must not be cut or melted excessively; and hardware must not create a damaging bend or pinch point. Testing should include the finished product, not just incoming webbing.

Common misconceptions

“Nylon is always stronger.”

Not as a general rule. Strength depends on fibre grade, yarn construction, density, width and testing method. Nylon is often tougher and more extensible, but a particular polyester webbing may have a higher specified breaking force.

“Polyester never stretches.”

Polyester webbing does elongate under load. It generally elongates less than nylon, but the amount depends on construction and load. Low stretch is not zero stretch.

“Waterproof” means unaffected by water.

Webbing may be water resistant without being waterproof. Water can enter the weave, seams and hardware interfaces. A coating may alter surface wetting without eliminating moisture-related wear.

“If it looks fine, it is safe.”

Appearance is useful but incomplete. Hidden seam damage, UV-related strength loss, internal abrasion and hardware fatigue may not be visible. Products used in safety-critical roles require inspection and replacement criteria based on the manufacturer’s guidance.

“The fibre decides the whole product.”

Fibre is one variable. Weave, finish, stitch design, hardware, fit, cleaning, storage and exposure history can dominate real-world performance.

Practical conclusion

For many exposed equestrian applications in Great Britain, polyester is the conservative starting point where low stretch, low moisture absorption, dimensional stability and UV resistance are important. Nylon remains highly useful where toughness, flexibility, softness or greater elongation are valuable, especially when the product is designed and tested for that behaviour.

The best choice is therefore application-led:

• choose polyester for stable, low-stretch outdoor performance and frequent wet exposure;
• consider nylon where suppleness, toughness and controlled elongation are useful;
• do not compare fibres without comparing the webbing’s construction and specification;
• inspect seams, edges and hardware as carefully as the tape itself;
• replace damaged or suspect equipment rather than relying on visual optimism;
• treat certified or safety-critical assemblies as complete engineered systems.

In practical tack work, “polyester versus nylon” is not a contest with one universal winner. It is a decision about how the complete product should behave when wet, loaded, flexed, rubbed, exposed to sunlight and handled around horses.

Sources and further reading

• ISO 13934-1:2013, Textiles — Tensile properties of fabrics — strip method.
• ISO 13935-2, Textiles — Seam tensile properties of fabrics and made-up textile articles.
• Webbing Products, What is Webbing?.
• Webbing Products, Lifting and Recovery Webbing technical information.
• Webbing Products, Tie-Down Webbing technical information.
• Driver and Vehicle Standards Agency, Securing loads: lashing straps.
• GOV.UK, The Highway Code: rules about animals.
• GOV.UK, Code of Practice for the Welfare of Horses, Ponies, Donkeys and their Hybrids.
• Health and Safety Executive, UK law on the design and supply of products.

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