Main Material 1: 77% Polyester, 23% Elastane - Interlock - 250.00 G/M² - Piece Dyed - Chemical - Coating, Chemical- Wicking (Bio-Based) - Drycell The Run Aop Crop Tank Is A Performance Running Must Have. This Crop Tank Features A Technical Compressive Fabric, Reflectivity, A Back Cut Out Detail For Ventilation, A Seasonal Camo Graphic, And Puma"S Signature Drycell Technology To Help Keep You Dry.