Darn Tough Fred Tuttle Midweight Micro Crew Sock with Cushion (Men) - Gravel Size:Medium (M) Meets ASTM F2412-11 and F2413-11

Meets ASTM F2412-11 and F2413-11 M I/75 C/75 EH standards

while also being resistant to abrasion and staining

made with 100% boiled wool upper and a cozy wool footbed for ultimate comfort

Regarded as one of the most adaptable winter footwear options

Uppers crafted in top quality suede leather and double-sided sheepskin

Darn Tough Fred Tuttle Midweight Micro Crew Sock with Cushion (Men) - Gravel Size:Medium (M) Meets ASTM F2412-11 and F2413-11The Fred Tuttle lives by a simple creed. "Do it right the first time". So we "measured twice and cut once" when we created this sock. The end result is comfort, durability and fit you can count on every single day. Performance Fit: No slipping, no bunching, and no blisters. Fine Gauge Knitting: Unprecedented durability and our unique "put it on, forget it's on" feel. Fast Action Wicking: Pulls moisture away from skin. Fast drying. All Weather