Anti-bacterial, and moisture transport. Flat seam construction for seam strength and to eliminate abrasion. Body conforming fit. "We engineer the most advanced performance products possible; test and retest for function and durability. At Hot Chillys we guarantee our products to keep you warm, comfortable and good looking... but not necessarily in that order. Content: 45% MTF Polyester, 45% Micro Denier Polyester, 10% Lycra |