Fresh New Sports Bra Design. Our white sports bra crop top is made with the perfect Nylon/Spandex blend that is moisture-wicking, breathable, antibacterial, and gives you all the 4-way stretch you will ever need. Removable inserts and adjustable straps will also allow you to adjust your new mesh-back bra to your preferred shape and level of support. Details: Medium Support Medium Coverage Size Guide Size: Extra Small Small Medium Large Bust: 30-32" 33-35" 36-37" 38-40" Chest Measurements: Measure under arms around at the fullest part of the bust. Be sure to keep tape level across your back and comfortably loose. Care Instructions: For best results hand wash and hang dry.