Built to last! Thorlos signature padding provides critical protection in the forefoot and heel. Protects from blisters on a hot court with Thorwick Cool(R) fibers. Design: Graduated compression for improved circulation and reduced muscle fatigue Triple zone compression in the arch, ankle, and leg Targeted heel and toe padding protect against minor impact Ionic+TM Technology designed to eliminate odor-causing bacteria THOR*WICK(R) COOL fibers for drier and cooler feet Engineered mesh for moisture control and breathability Arch support and Fascia Achilles protection with extended heel cushion Smooth toe seam for optimal fit Additional Details Fiber content: 54% Polyester, 37% Nylon, 9% Elastic