Hot Chillys Men Midweight Micro-Elite Chamois Ankle Tight 100% Polyester Ankle tight, Anatomically fit for freedom of movement and support to help reduce fatigue Mid-weight, Hot Chillys 8 Warmth Factor, Anti-Microbial prevents odor and growth of bacteria 4 way stretch fabric, Fabric: MTF micro polyester, Bio Silver Antimicrobial polyester and spandex Lightly sanded finish for extra softness 30+ UPF protection