Helly Hansen Fyre Multinorm Baselayer Long Underpants 75449
If you're working in high-risk environments where flame protection matters, these multinorm underpants deliver serious safety without compromising on comfort. Built with a modacryl and cotton blend, this baselayer provides inherent flame retardancy that doesn't wash out over time. The flatlock seams work hard to eliminate irritation during long shifts, whilst reflective design details ensure you're visible when it counts. Whether you're in offshore operations, agricultural settings, or steel fabrication, these long underpants form the foundation of a reliable protective clothing system. The breathable fabric keeps you regulated throughout the day, and the antistatic properties add an extra layer of protection in demanding work environments.
Key Features
- Inherently flame retardant protection without washing out
- Flatlock seams designed for all-day comfort and reduced irritation
- Antistatic properties for enhanced workplace safety
- Breathable modacryl and cotton construction for regulated temperature control
- Reflective design details for improved visibility
Recommendations from our Unishore Expert
These multinorm underpants are engineered as a foundational baselayer for professionals operating in high-risk sectors. The blend of modacryl and cotton delivers both the protection you need and the comfort required for extended wear. The flatlock seam construction prevents chafing, which becomes critical when you're wearing protective workwear for entire shifts. These long underpants work best as part of a layered approach to multinorm protection, worn underneath your outer workwear to maximise safety across flame, arc flash, and antistatic hazards. The fabric breathability helps manage moisture and body temperature, keeping you focused on the job rather than discomfort.
Product Features
- Material - 59% Modacryl, 39% Cotton, 2% Antistatic, 250 g/m²
- Fit - Regular
- Length - Normal
- Leg Length - Full length
- Article Number - 75449
Standards and Safety
- Surface area flame protection with EN ISO 11612 A1 classification
- Convection heat protection with EN ISO 11612 B1 classification
- Radiation heat protection with EN ISO 11612 C1 classification
- Antistatic performance certified to EN 1149-5
- Electric arc protection rated APC 1 under IEC 61482-2 classification
- Arc thermal performance value of 7.3 cal/cm² per IEC 61482-2