Portwest Bizflame Rain+ Hi-Vis Multi-Norm Contrast FR Winter Trousers

The Portwest FR434 Bizflame Rain+ Hi-Vis Multi-Norm Contrast FR Winter Trousers deliver exceptional multi-hazard protection for workers facing harsh weather conditions and high-risk environments. Engineered with Portwest's advanced Bizflame Rain+ technology, these flame resistant winter trousers combine waterproof protection, high-visibility performance, and outstanding thermal insulation in one premium garment.

Constructed from an innovative fabric blend of 60% Polyester, 21% Modacrylic, 18% Cotton, and 1% Carbon Fibre with a 7mm Ripstop PU coating at 270g/m², these trousers provide robust defence against multiple workplace hazards. The flame resistant cotton lining (170g/m²) ensures all-day comfort while maintaining critical fire protection properties from the inside out.

The contrast Yellow/Navy design maximises visibility in low-light conditions while the navy lower panels provide practical protection against dirt and wear. These hi-vis FR winter trousers are the ideal companion piece to the FR617 Bizflame Rain+ Hi-Vis Multi-Norm Contrast FR Winter Jacket, creating a complete protective ensemble for demanding outdoor work.

Key Features & Benefits

Multi-Hazard Protection

• Certified flame resistant fabric that prevents fire spread and self-extinguishes
• High arc flash rating for electrical hazard protection
• Chemical splash resistance for hazardous material handling
• Anti-static properties (1% Carbon Fibre) to prevent static discharge

Superior Weather Defence

• Waterproof PU-coated outer shell prevents water penetration
• Breathable construction draws moisture away from the body
• Taped seams provide additional waterproof protection
• Winter-weight insulation for cold weather comfort

Enhanced Visibility

• Hi-Vis yellow upper section for maximum daytime visibility
• Flame resistant reflective tape for night-time recognition
• EN ISO 20471 Class 2 compliant visibility performance
• Contrast navy panels maintain professional appearance

Comfort & Practicality

• Fully elasticated waistband for secure, comfortable fit
• Quick-release buckle braces for easy adjustment
• Zipped ankles for fitting over work boots
• Back waist buggy for added protection and coverage
• Multiple pockets for essential tool and equipment storage

Technical Specifications

Safety Standards & Certifications

These Portwest FR434 trousers are certified to multiple international safety standards, making them suitable for multi-norm environments:

• EN ISO 20471 – High-Visibility Warning Clothing
• EN ISO 11612 – Protective Clothing Against Heat and Flame
• EN ISO 11611 – Protective Clothing for Welding
• IEC 61482-2 – Arc Flash Protection
• EN 1149-5 – Anti-Static Properties
• EN 13034 – Chemical Splash Protection
• EN 343 – Waterproof and Breathable Performance
• CE-CAT III – Complex Design PPE

Ideal Applications & Industries

The Portwest Bizflame Rain+ FR434 Winter Trousers are specifically designed for professionals working in:

• Oil & Gas – Offshore platforms, refineries, and petrochemical plants
• Utilities – Electrical substations and power generation facilities
• Construction – Welding, hot works, and outdoor winter projects
• Rail Industry – Track maintenance and infrastructure work
• Emergency Services – Fire and rescue operations
• Manufacturing – Metal fabrication and industrial processing
• Mining & Quarrying – Underground and surface operations

Care Instructions

To maintain optimal performance and longevity of your FR workwear:

• Machine wash at 60°C using non-biological detergent
• Do not use fabric softeners or bleach
• Tumble dry on low heat or line dry
• Do not dry clean
• Inspect regularly for damage or wear
• Replace if fabric integrity is compromised

Why Choose Portwest Bizflame Rain+ FR434?

Portwest has manufactured protective workwear since 1904, building a reputation for quality, innovation, and reliability. The Bizflame Rain+ collection represents the pinnacle of multi-hazard protection, combining over a century of expertise with cutting-edge fabric technology.

When you choose the FR434 Winter Trousers, you're investing in:

• Proven Protection – Multi-norm certification covers the widest range of workplace hazards
• Year-Round Versatility – Insulated construction for winter warmth without bulk
• Long-Term Value – Durable ripstop fabric extends garment lifespan
• Complete Compatibility – Pairs perfectly with FR617 jacket for head-to-toe protection
• Trusted Brand – Portwest protective wear is specified by leading global organisations

Q: What safety standards do the Portwest FR434 trousers meet? A: The FR434 trousers are certified to EN ISO 20471, EN ISO 11612, EN ISO 11611, IEC 61482-2, EN 1149-5, EN 13034, and EN 343, providing comprehensive multi-hazard protection.

Q: Are these trousers suitable for welding work? A: Yes, the FR434 trousers are certified to EN ISO 11611 for welding and allied processes, offering protection against molten metal splashes and radiant heat.

Q: What jacket pairs with the FR434 trousers? A: The FR617 Bizflame Rain+ Hi-Vis Multi-Norm Contrast FR Winter Jacket is specifically designed as a companion piece, providing matching protection and visibility.

Q: Are the Portwest FR434 trousers waterproof? A: Yes, the PU-coated outer shell with taped seams provides waterproof protection certified to EN 343 Class 3:3.

Q: What sizes are available? A: The FR434 is available in sizes S through XXXL in regular fit.