BambooMN - Men's Rayon from Bamboo Fiber Mid-Calf Socks - Size M/L/XL 10% polyester Content: 85% Rayon from bamboo, 10% Polyester, 5% Elastic Rayon- Natural, Renewable, Biodegradable, Anti-microbial / Natural Deodorizer Year round for those in warmers States and 9 months for those in the deep freeze zone. Cool in summer - some warmth in the cold. Rayon from Bamboo is great at wicking away moisture helping regulate body temperature These are Mid-Calf socks. Men's Medium/Large fits Size 6-10 (25x28cm); Men's X-Large fits Size 10-14 (27x30cm). You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!