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Shield Single Layer Spectra® Denim Jeans – Short Leg


Size Guide

The pinnacle of the Knox jean collection due to their amazing strength and high-performance Class AAA rating, a class normally reserved for leather suits.

The Shield Jeans are a true single layer jean with no extra mesh lining like most single layer jeans and are made with a newly developed Spectra® denim. They look exactly like regular jeans but with incredible strength and durability.

Spectra ® is 40% stronger than aramid and fifteen times stronger than steel and is one of the world’s strongest and lightest fibres. Knox, being a Spectra partner have the privilege of being the first company to work with this new denim. The weave of the denim is patent pending and is entirely unique and delivers unparalleled strength in like for like weights.



The Shield Single Layer Spectra® Denim Jeans for men are the epitome of Knox’s jean collection.  With their remarkable strength and Class AAA rating that meets EN17092-2:2020 standards, they offer high-performance protection.

Crafted from Ultra-High Molecular Weight Polyethylene fibres, the jeans provide both strength and flexibility.  Spectra® fabric is renowned for its high durability, being 40% stronger than aramid and 15 times stronger than steel.  This unique weave provides unparalleled strength in its weight class.

In addition to this superior comfort and strength, the Spectra® denim repels moisture and helps regulate body temperature.  These jeans are also hypoallergenic, so you won’t experience any irritation.

The jeans come equipped with four invisible armour pockets for low-profile Knox CE Micro-Lock protectors in the hips and knees. The armour is removable and comes with a 5-year warranty when registered.  The Shield jeans are part of the Knox Seasonless Collection, so simply layer with waterproof overtrousers in wet weather, or add a base layer for extra comfort.

Tested to EN ISO 11612:2015 standards, the Spectra® denim offers heat resistance for added protection.  The jeans are designed with a sleek, tapered fit that looks great on and off the bike. The waist features leather branding, Knox branded rivets, a key ring, waist button, and YKK zips, finishing the jeans with a touch of elegance.  Four deep pockets and machine washability make these jeans practical for everyday use.

Choose from indigo blue in either a short 30” leg or regular 33” leg.  The men’s jeans come in sizes S-3XL.



  • Made from Ultra-High Molecular Weight Polyethylene fibres known for their high strength and durability (UHMWP) with added stretch for exceptional comfort.
  • The Spectra denim fabric provides some heat resistance. They have been tested to EN ISO 11612:2015 and pass the requirements for Radiant and Contact heat.
  • CE Approved to EN17092-2 Class AAA
  • Carefully tailored tapered fit for a perfect fit on and off the bike.
  • Invisible armour pockets with external access for easy removal of low profile Knox CE protectors.
  • CE approved Knox MICRO-LOCK knee and hip protectors supplied as standard.
  • 5 year guarantee on Micro-Lock protectors when registered
  • Leather branding on the waist.
  • Knox branded hardwear including rivets, key ring and waist button
  • YKK Zips
  • 2 back pockets with stitch detailing
  • 2 deep front pockets with cotton lining
  • Machine Washable – see content label for details.
  • Colour – Indigo Blue only
  • Leg Length – Short leg 30”, Reg Leg 33”.
  • Sizes S 30” – 3XL 40”
  • Part of the Knox Seasonless Collection

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Technical Information

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Knox Micro-Lock is fully CE certified to EN 1621-1:2012 Level 1 T+ & T-

EN1621-1-2012 REQUIREMENT Status
Approval of Technical file Mandatory Passed
Approval of user information Mandatory Passed
Minimum zone of protection Mandatory Passed
Performance in ambient conditions Mandatory Passed
Performance in hydrolytic conditions Mandatory Passed
Performance in high temperature conditions Optional Passed
Performance in low temperature conditions Optional Passed
Ergonomic assessment Mandatory Passed
Product marking Mandatory Passed
Innocuousness Mandatory Passed

Size Guide

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Waist: To work out your size, measure your waist in the position your trousers usually sit. As a guide, this is roughly 2 inches (approx 5-6cm) below your belly button. Once you have this measure, minus 2 inches (approx 5-6cm) from it to get your trouser size.

Inside Leg: Measure from the top of your inside leg down to your ankle. You should do this whilst standing to get a more accurate measure.

Please note: The measurements given are body measures and we recommend you do not measure over the clothing. Also please hold the tape measure firmly and not loosely as the measurement needs to be fitted.

Men's UK Size Waist (inches) Waist (cm)
S 30 76
M 32 81
L 34 87
XL 36 92
2XL 38 97
3XL 40 102
4XL 42 107
5XL 44 112


Core Knox pieces, used for every ride and every season. Start with core protection and add layers to adapt and overcome all conditions, from unbearable heat through to driving rain.


Knox trousers and jeans are designed to complement the Knox seasonless collection and to appeal to different types of riders across all climates.

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