Zoot Sports Men's Performance Tri Tank Body: 80% Nylon / 20% Spandex, 193gm2/Inset: 82% Polyester / 18% Spandex, 200gm2/Mesh: 86% Polyester / 14% Spandex, 219gm2 Imported SeamLink stitch construction ensures next-to-skin comfort, minimizes chafing and stretches with fabric Performance Endura fabric to help you stay dry and comfortable Mesh panels at back for enhanced breathability Dual back pockets for nutrition storage Reflective details for visibility in low-light conditions