Hi Vis Trousers

EN ISO 20471 Certification and Class Requirements

EN ISO 20471:2013 defines minimum fluorescent fabric and reflective tape areas. Class 1 requires 0.14m² fluorescent material and 0.10m² reflective tape – suitable for low-risk environments where vehicles travel under 19mph (warehouses, loading bays). Class 2 requires 0.50m² fluorescent fabric and 0.13m² reflective tape, mandatory for roadside and trackside work where vehicles exceed 25mph. The reflective material must ensure 360-degree visibility; horizontal bands around the legs are critical because they remain visible when you're kneeling or crouching – the exact moment when lower body visibility matters most.

Products in this collection include high visibility trousers certified to EN ISO 20471; check individual listings for exact class designation. Garments must be CE marked and tested to the standard. HSE guidance confirms that darker ambient conditions require greater amounts of high-visibility clothing, and reflective strips at or below waist level on trousers are essential for all-angle recognition.

Colour Selection: Yellow vs Orange Hi Vis Trousers

Fluorescent yellow high visibility trousers perform best in bright daylight and are the standard choice for construction sites, highways maintenance, and general roadside work. Orange hi vis trousers are specified under Network Rail's RIS-3279-TOM standard (issued December 2016) for railway infrastructure work – the orange wavelength stands out against green lineside vegetation where yellow fades into the background. Orange workwear trousers also suit quarries and dusty environments. This isn't aesthetic preference; it's about which colour provides maximum conspicuity against your specific work background.

Durability, Pockets, and Maintenance

Look for polycotton or polyester fabrics (210–245gsm) that resist tearing during ground work. Reinforced knee patches (often Cordura or Oxford fabric rated to EN 14404 when used with knee pads) extend garment life on concrete and aggregate. Cargo pocket positioning matters: quality hi vis work trousers place pockets outside the minimum fluorescent material area so they don't compromise certification. Cheaper options place pockets over fluorescent zones, reducing effective visible area below Class requirements.

To maintain EN ISO 20471 certification: • Wash at 60°C maximum • Avoid fabric softener (degrades reflective properties) • Replace after 50 industrial washes or when reflective tape shows cracking

Typical applications include construction sites, utilities installations, warehousing with forklift traffic, highways maintenance, railway trackwork, airport ground operations, emergency response, and any role where lower body visibility affects safety around moving equipment. Options include lightweight hi vis trousers, waterproof pants hi vis, cargo styles, and 4-way stretch work trousers for physically demanding roles.