Two pairs of ultra-comfortable socks make up the Massif FlameStretch FR Sock System. The outer layer is a warm, comfortable fire-resistant Nomex stretch-fleece sock made from Massif FlameStretch fabric. The liner is an extremely high-quality wool sock from Darn Tough that wicks moisture from the feet to help prevent blisters and soggy feet.
Massif FlameStretch is constructed with DuPont Nomex brand fiber. Engineered with Massif's proprietary knitting and finishing technology. FlameStretch provides built-in flame-resistance, proven durable performance, and comfort from the inside out.
- One pair of Merino Wool Sock Liners from Darn Tough
- One Pair of FlameStretch Fleece Socks from Massif
- Authorized by the United States Coast Guard
- Fabric passes stringent ASTM D 6413 Standard for flame-resistance
- Made in the USA