The Flite XT is the most technologically advanced sock ever developed, providing all-around stability. It offers moisture-wicking fibers, blister-free performance, and medium compression for lasting arch support at any cuff height. AnkleLock™ Technology GripDry™ Fiber Made in USA Moisture Wicking Lifetime Performance Guarantee Fabric tech AnkleLock™ Technology GripDry™ Fiber CUSHIONING Medium For versatile comfort COMPRESSION Moderate For flexible support best for Running Fitness Trail Running Golf Arch Band SupportMaintains shape, keeps sock in place and gently supports arch. GripDry™ FiberA proprietary Nanofiber with tiny micro treads to increase surface area, frictional force, and gripping power. It is used in the heel and forefoot to keep you stable in your shoes. Mesh UpperProvides ventilation and increases breathability, keeping feet cool. . Details Engineered to perform, whatever the activity AnkleLock™ Technology featuring targeted ankle and heel support provides protection during quick movement Proprietary GripDry™ fiber in the heel and forefoot grips shoes to keep feet stable Material & Care 59% Nylon / 23% Olefin / 16% Polyester / 2% Spandex Machine wash cold. Tumble dry low. Do not bleach or iron. Our Guarantee Swiftwick socks are made to endure through thick and thin. The Lifetime Performance Guarantee is our commitment both to our products and to our customers, ensuring our socks stand the test of time.If your Swiftwicks wear out for any reason, we’ll replace them. Simple as that.