"Running Lite" Lightweight Version of "Original" Anti-Blister System. Double Layer Protection with 40% Less Weight. Dri-Wright Polyester/MicroSafe Inner Layer. Flat Knit. Ideal Lite Weight Sock When Speed is Needed. Content: Inner Layer: 55% Dri-Wright Polyester, 15% MicroSafe, 30% Nylon/Outer Layer: 68% Dri-Wright Polyester, 28% Nylon, 4% Lycra |