Oct 24, 2020 · 100% Qiviut Socks by Qiviuk — musk ox wool is the warmest and softest fiber in the world — $219 (!) Icebreaker Everday Crew Sock — 79% Merino Wool, 20% Nylon, 1% Spandex — $20; Fox River Trailhead Heavyweight Crew Sock — 77% merino wool — $17; 100% Cashmere Socks by Lona Scott – very soft and warm — made in Scotland – $40
Wool is naturally fire-retardant. This means it ignites at higher temperatures than cotton and some synthetic fibres. It also has a lower rate of flame spread and heat release, a lower heat of combustion and does not melt or drip when being burned. It just sort of extinguishes onto itself forming a char, while exhausting less toxic gasses.