This flat knit sock provides a close, lightweight fit that acts like an adventurer’s second skin to minimize friction and blisters. Use with a second sock when extra warmth and protection is needed. Features a flat-knit toe seam for maximum comfort and ribbing to hold sock in place. Crew height works nicely with heavy-duty socks and boots. Content: 57% SmartWool, 38% nylon, 5% elastic. Machine wash warm. Tumble dry. Do not bleach. Available Colors: Black, Natural White.