The Aspire offers a thin, breathable feel and firm compression for enduring performance on runs, rides, and more. Engineered with moisture-wicking fibers, it keeps feet and ankles dry, secure, and supported. Firm Contoured compression® Fiber First® Moisture Wicking Made in USA Moisture Wicking Lifetime Performance Guarantee Fabric tech Fiber First® Moisture Wicking Technology CUSHIONING Minimum Minimum for a thin profile COMPRESSION Firm Firm to reduce fatigue best for Running Cycling Golf Y-shaped HeelCreates a snug fit that moves with your foot without bunching or slipping. Ankle Cuff HeightProviding optimal support and protection, this minimal silhouette provides more protection from your shoe. Channeled UpperIncrease breathability to help keep feet cool. Details Engineered with an ultra-thin profile to deliver unparalleled fit & feel Signature Olefin fibers wick moisture, keeping your feet cool, dry, and blister-free Grips the contours of your feet to support the arch and help reduce fatigue Material & Care 53% Nylon / 39% Olefin / 8% 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.