70% Polyester, 30% Rayon, Lightweight, moisture-wicking fabricImported?? Back cut-out with twist detail, knotted shirt, sexy and charming?? The open back and slightly loose fit creates a breezy feel with more cooling as your run heats up?? Flat lock stitch to reduce chafe?? This Women’s Training Tank is ideal for your workout. Lightweight, sweat-wicking fabric helps keep you dry?? Please check our size chart before purchasing if you are the first time to buy this product. Visit our Amazon store to find the matching part: sports bra, yoga pants, active shorts etc.