Portwest FR Lightweight A/S Trousers FR401

Portwest FR Lightweight A/S Stretch Work Trousers FR401

When you need flame retardant work pants that don't compromise on comfort, these multinorm work trousers deliver. Crafted from a lightweight FR cotton blend, they're engineered with stretch sections at key stress points, giving you the freedom to move through your working day without restriction. Whether you're bending, climbing or reaching, these long leg work trousers keep pace with you. The design packs eight storage pockets, including practical knee pockets positioned in two locations, plus side cargo pockets for phones and tools. An adjustable hem lets you dial in the perfect fit, whilst the elastic waist keeps things comfortable during active shifts. The reflective striping boosts visibility on site, and the whole package meets strict safety standards across multiple hazard categories.

Key Features

• Lightweight FR cotton with strategically placed stretch sections for movement
• Eight storage pockets including two knee pocket positions for added practicality
• Adjustable hem length accommodates different leg sizes and work requirements
• Reflective striping provides enhanced visibility across work environments
• Meets multiple safety standards including flame retardant and electrical arc protection

Recommendations from our Unishore Expert

You're looking at a proper workstation-to-site solution here. The FR cotton composition gives you breathability without sacrificing the protection you need around heat and flame, which matters if you're moving between different risk areas. Those stretch sections aren't just there for comfort, they actually reduce fatigue when you're in awkward positions. The cargo pockets on the thigh keep your essentials within reach, and honestly, once you've got your phone and tools sorted in those, you realise how much time you save not hunting through layers. The knee pocket positioning means you can add protection where impact happens, so it's adaptable depending on what your day throws at you. The adjustable hem is worth mentioning too, because a proper break on the boot matters for both safety and how long the trousers actually last.

Product Features

• Material - 99% cotton with 1% carbon fibre (main body), 97% cotton with 2% elastane and 1% carbon fibre (stretch panels)
• Fit - Regular
• Pockets - Thumb pocket, cell phone pocket, hand pockets, cargo pockets, two knee pocket positions and back pockets
• Leg Length - Long leg length with adjustable hem
• Length - Normal
• Article Number - FR401

Standards and Safety

• Flame retardant protection against surface and edge ignition with heat resistance to convection, radiation and contact heat (EN 11612: A1+A2 B1 C1 E2 F1)
• Limited protection for welding situations with tested seam and material integrity (EN 11611 Class 1 A1+A2)
• Electric arc protection rated to 9.4 CAL/CM² for hazardous flash events (IEC 61482-2, IEC 61482-1-1)
• Antistatic properties according to strict electrical conductivity standards (EN 1149-5)
• ATEX-compliant for use in potentially explosive atmospheres (ATEX EDPP 137)