2XU Women's Compression Tank Top 80% Nylon/20% Spandex Imported Powerful 70D fabric with muscle containment compression supports the upper body and core Graduated compression improves blood flow for faster warm up and recovery 360 knit construction with invista LYCRA creates consistent, yet powerful pressure to reduce fatigue Mesh paneling increases breathability as you move Moisture-wicking and antibacterial properties keep sweat and odors in check with 50 UV fabric provides extra protection against the sun's rays