Portwest FR737 PW3 Modaflame Knit HVO Class 1 FR Sweatshirt – Product Description

The Portwest FR737 PW3 Modaflame Knit HVO Class 1 FR Sweatshirt is a high-performance flame resistant garment designed for workers operating in hazardous, high-heat, and low-visibility environments. Constructed using Modaflame Knit HVO fabric, it delivers inherent flame resistance that will not diminish with repeated industrial laundering, ensuring long-lasting protection and reliability.

Its segmented reflective tape provides Class 1 high visibility without restricting movement, while the crew neck, ribbed collar, cuffs, and hem ensure everyday comfort during extended work shifts. The sweatshirt offers certified protection against radiant, convective, and contact heat, as well as electric arc hazards, making it suitable for workers across utilities, energy, rail maintenance, engineering, construction and ATEX-rated environments.

With exceptional colour fastness, shrink resistance, and a soft high-cotton feel, the FR737 combines durability with wearer comfort. CE-CAT III certification and multi-norm protection ensure compliance for operators requiring dependable FR and arc-rated safety in demanding industries.

Key Features

• Inherent flame resistant fabric retains protection after washing
• Certified protection against radiant, convective and contact heat
• Segmented reflective tape ensures visibility with unrestricted movement
• Ribbed collar, cuffs and hem for comfort and fit
• Crew neck design ideal for layering
• Suitable for ATEX environments
• Excellent colour fastness and shrinkage control
• CE certified and CE-CAT III

Fabric Composition

Modaflame Knit HVO 45 percent modacrylic, 25 percent polyester, 23 percent cotton, 6 percent aramid, 1 percent carbon fibre 300g
Contrast fabric: Modaflame Knit 60 percent modacrylic, 39 percent cotton, 1 percent carbon fibre

Certifications

EN ISO 11612 A1 B1 C1 F1
EN 1149-5
IEC 61482-2 and IEC 61482-1-1 arc protection ELIM 8 cal per square centimetre and ATPV 8.9 cal per square centimetre
IEC 61482-1-2 APC 1
EN ISO 20471 Class 1