Woolie Boolie 4" D-Logo Charcoal in a classic deep charcoal grey with white d-logo on the side of the cuff. The DeFeet Woolie Boolie is our cushiest sock, with a cult following for all the right reasons: woolie warmth, padded comfort, and durability. - Full padding / 3-season / Wool - Content: 70% Merino Wool, 27% Nylon, 3% Lycra - Care: Machine wash cool. Tumble dry low. No bleach, softeners, or harsh detergents. Engineered to be long-lasting, DeFeet products are sustainably manufactured within a local supply chain. Our wool goods are made from USA-grown Merino, traveling from Oregon to the Carolinas for processing and knitting. Our recycled poly is manufactured right here in North Carolina at Repreve from locally collected post-consumer water bottles.