This specially engineered fabric delivers a unique type of softness that can still wick sweat like a champ. It's lightweight, it's breathable, and it's ready to work. Super soft, brushed knit fabric is breathable & comfortable. 4-way stretch material moves better in every direction. Built-in shelf bra for added coverage & support. Classic racerback design. Shaped bottom hem with overlap side vents. 90% Polyester/10% Elastane