NWT Women's Flex Strappy Dress w/Built in Shorts Size Large Sleeveless flex exercise dress in a pullover style designed with a racerback silhouette and featuring adjustable straps for a customized look. The soft and stretchy fabric helps you move and stretch in comfort, while the moisture-wicking, quick-dry fabric construction helps absorb the sweat to keep you cool and fresh. Plus, with the UPF 50+ rating, you'll stay shielded from the sun as you practice. Come with built-in shorts.