Features Work out with ease in this underwire sports bra America’s #1 selling sport bra Built for high-impact activities such as kickboxing Full coverage two-ply cups hold bust firmly in place Natural shape achieved with molded double-layer cups Extra support given with inner slings in G through I cups Cushioned outside underwire prevents chafing 8 row, single hook strap adjustments; may vary by size 3 column, 3 row hook & eye closure; increases with size Breathable mesh back and moisture-wicking microfiber Style Number 855170 Content Body: 80% Nylon, 20% Spandex.