Feetures Men's Elite Merino+ Ultra Light Quarter, EXTREME COMFORT: Our Elite Merino+ socks combine our Elite technology with our unique blend of super fine merino wool and silky soft rayon from bamboo as well as a seamless toe that provides truly unsurpassed comfort. LIGHTWEIGHT: These socks take up less room in the shoe and are perfect for those who prefer a lighter, cooler feel. TEMPERATURE CONTROL: Our Ultra Light socks are super thin and extra breathable, and are designed to keep feet cool under the most intense conditions. These socks also insulate when wet which keeps feet warm in cool and damp conditions. ANTI-ODOR: Our Merino+ fibers have natural anti-odor properties, perfect for any athlete. LIFETIME GUARANTEE: We stand behind the quality of our socks and want you to have a great experience with every product we make. If at any point you are unsatisfied with one of our products, you may return it for a replacement or a refund.