The thin profile Aireator features an open mesh weave over the foot top, making these lightweight socks ideal for all forms of cycling and everyday adventure. Breathable, moisture wicking, and durable. - No padding / 4-season / synthetic - Content: 60% Nylon, 39% Recycled Polyester, 1% Lycra - Weight: 1.6 oz/.10 lb - 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.