Under Armour UA Women Hi-Impact Support Bra nylon Whether you're an A ,B or C D an ill-fitting bra can rattle your focus, and even your self-confidence. We tested hundreds of prototypes, enlisted the experts, and asked the athletes. The result is the next-generation bra sized for both band and cup to deliver the perfect performance fit. No more digging, no more bunching, and-most importantly-no more bouncing. Just a comfortable, confident fit that changes the game for good.