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Portwest Flame Resistant Stretch Trousers FR Work Trousers

Product Code: FR404

Regular price From £50.89 exc VAT £61.07 inc VAT
Shipping calculated at checkout.

  • ATPV 12CAL/CM2
  • Thermal Hazard Protection
  • Flexi-Fit Stretch Fabric

Was dubious about buying, a bag, of the beeswift mp1 gloves, as I was actually looking for an alternate brand, I've had gloves before that were all bundled together, where the rubber was too hard and the material like an old rope, the company sent them out really fast delivery, individually wrapped, premium gloves, really happy, top drawer, as these will be stored in the garage, no damp or spider issues, big thanks to George @ gloves & stuff.

A Andyvia Trustpilot

Decent gloves at a reasonable price. Delivered within a good delivery window. These gloves have reasonable longevity in medium workloads.

Brett Seedhouse Brett Seedhousevia Trustpilot

Good company to buy from; just took a bit longer than expected (9 days)from order to being despatched for delivery. The response was quick when I emailed them with a query. Will definitely use again.

C Cherie Rowdenvia Trustpilot

I've always had a good experience with this family run business, always able to ring and get any queries sorted. Quick delivery and products all as described on the website.
The process from order to delivery is smooth and stress free. I would definitely recommend them.

C Claire Davisvia Trustpilot

What an amazing company. I bought safety shoes from them and could not fault them with anything. Communication from the seller was spot on. Kept me updated on delivery times and delivery was super quick as well, not to mention that they had the best price out there. These shoes are so comfy :). Thank you very much, I would happily use them again and highly recommend to anyone. I am glad I did not cancel my order because of the previous bad reviews.

C Customervia Google

Got my product shipped to ireland and was impressed with how quick it arrived.
Price was still cheaper even after I paid the customs fee. Would recommend and I will be using again 🤝

D Derek Griffinvia Trustpilot

A pleasure to do business with George, Paul and the team. Have been using them for years and will continue to do so. Great customer service, speedy shipping and an extensive range of products.

M Marcus Lewisvia Google

Ordered some safety trainers as they offered the fastest delivery and lowest price. My order was a day late but this was due to a supply chain issue with the manufacturers. George kept me up to date and they still arrived before other company’s expected delivery date. The quality of the trainers are amazing and I will be definitely using this company again for my future supply’s.

M Melissa Alexandervia Google
Fast Delivery

Next day delivery for in stock orders placed before 1:00pm.

Portwest Flame Resistant Stretch Trousers FR Work Trousers

Regular price From £50.89 exc VAT £61.07 inc VAT

Description

12CAL Arc Protection That Moves With You

The Portwest FR404 Bizflame 88/12 Stretch FR Trousers deliver serious protection without the stiff, restrictive feel of traditional flame-resistant workwear. Built for electricians, utility workers, and anyone facing arc flash hazards, these trousers combine certified multi-norm protection with stretch fabric that actually lets you move. The slim fit design stays form-fitting without restricting your range of motion—crucial when you're working in tight spaces or need to move quickly.

Key Features:
  • Bizflame 88/12 Stretch Fabric: The clever mix of 86% cotton, 12% nylon, and 2% elastane at 350g weight gives you natural flame resistance with the flexibility you need. The garment wash treatment creates an exceptionally soft feel—none of that cardboard-stiff texture you get with cheaper FR gear.
  • Protection Against Multiple Heat Hazards: Guards against radiant, convective, and contact heat. Certified to EN ISO 11612 (A1+A2, B1, C1, F1) for comprehensive thermal protection in hazardous environments.
  • Flexi-Fit Technology: Added freedom of movement where you need it most. The stretch fabric works with your body instead of against it—bend, crouch, climb without feeling restricted.
  • Adjustable Hem Design: Converts from regular to long leg length. No need to order multiple sizes or deal with trousers that bunch up inside your boots.
  • Practical Storage: Four pockets plus two back patch pockets. Enough room for tools, phone, and essentials without overloading your belt.
  • Professional Appearance: Available in Navy. The slim fit looks sharp while maintaining all the protective properties you need for oil and gas, chemical processing, welding operations, and electrical utilities.

Portwest's FR404 trousers are both CE certified and UKCA marked, meeting European and UK safety regulations. The combination of certified multi-standard protection, genuine stretch comfort, and professional design makes these an excellent choice for workers who refuse to compromise on either safety or functionality. Order your Bizflame 88/12 Stretch FR Trousers today.

Safety Standards

EN ISO 11612 EN ISO 11612
NFPA 2112 NFPA 2112
NFPA 70E NFPA 70E
ASTM F 1959 ASTM F 1959
Breathable Breathable
  • EN ISO 11612:2015 A1+A2, B1, C1, F1 - Protection against heat and flame
  • ASTM F1506 - Standard Performance Specification for Flame Resistant Textile Materials for Wearing Apparel for Use by Electrical Workers Exposed to Momentary Electric Arc and Related Thermal Hazards
  • NFPA 70E - Standard for Electrical Safety in the Workplace
  • NFPA 2112 - Standard on Flame-Resistant Clothing for Protection of Industrial Personnel Against Short-Duration Thermal Exposures from Fire
  • ASTM F1959/F1959M-14e1 ATPV 12CAL/CM² (HAF 80.6%) - Arc rating
  • EN ISO 13688:2013 - Protective clothing - General requirements
  • CE certified
  • UKCA marked

Size Chart

Delivery Information

UK Mainland Delivery

Free delivery on orders over £99 (ex VAT). For orders under £99, we charge only the actual carrier cost for next-day delivery - no inflated prices or hidden fees.

All orders include tracking via text and email notifications.

Scottish Highlands, Northern Ireland & Offshore

Additional delivery charges apply. Select your delivery area at checkout to see the exact cost.

Order Confirmation

You'll receive an email confirmation when you order, followed by a VAT invoice with tracking details once your order is packed.

Collection

Orders can be collected from our warehouse. Place your order online, by phone, or email, and we'll contact you when it's ready for collection.

International Delivery (EU & Worldwide)

We ship worldwide without UK VAT.

Important:

  • Your country's customs duties apply and must be paid on delivery
  • Business customers: We require your VAT/tax number for customs clearance
  • Refused deliveries: If an order is refused due to non-payment of duties, return shipping costs will be deducted from any refund