The Shock Absorber Ultimate Run Bra has a soft, seam-free inner lining for extreme comfort. It has a racer back with a soft, non-rub hook and eye closure that opens completely for ease in taking it off and putting it in. The reflective tape across the cups is not just decoration, it ensures high visibility when running outdoors. The straps are wide, padded, non-slip and completely adjustable. It is made from moisture-wicking advanced sports performance fabrics with a dry action system. Bounce Control Tested For Extreme Support Fabrics: 87% Polyamide, 13% Elastane 100 by OEKO-TEX Certified Fabrics - tested for harmful substances and deemed safe from a human-ecological perspective. For example, if your usual size is a 10D, choose a 12D instead.The Shock Absorber Ultimate Run Bra has a soft, seam-free inner lining for extreme comfort. It has a racer back with a soft, non-rub hook and eye closure that opens completely for ease in taking it off and putting it in. The reflective tape across the cups is not just decoration, it ensures high visibility when running outdoors. The straps are wide, padded, non-slip and completely adjustable. It is made from moisture-wicking advanced sports performance fabrics with a dry action system. Bounce Control Tested For Extreme Support Fabrics: 87% Polyamide, 13% Elastane 100 by OEKO-TEX Certified Fabrics - tested for harmful substances and deemed safe from a human-ecological perspective. For example, if your usual size is a 10D, choose a 12D instead.