Fabletics Wavy Cheetah On-The-Go Medium Impact Sports Bra XXS. Our fan-favourite sports bra has the racerback design and easy-access pocket you love—now in our new, sleek, smooth nylon material! This highly resilient fabric's built with UPF 50+ to help protect you outdoors. Features: Moisture-Wicking, Removable Bra Cups. Fabric: 81% Nylon/19% Elastane.