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. Product Details: - 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. DeFeet socks come with a 5-year warranty. If you are not satisfied with your product, we will replace it.