CW-X Men's Insulator Stabilyx 3/4 Tights 80% Coolmax, 20% Lycra Imported Flat seam construction eliminates abrasion and increases comfort 80% Nylon/ 20% Lycra Provides Targeted Support to the knee and core joints and muscles 100% Warmstretch Body Fabric Helps to keep the body warm and dry, pulls moisture away from the body and carries it to the outside of the tight