Simple cotton/spandex climbing tank with a built-in shelf bra. Designed with input from Mountain Hardwear's elite athletes, who asked for a straightforward, stylish tank. The cotton/spandex fabric of the Tonga Solid Tank is limber and durable, and easy to wash and wear, and the built-in shelf bra is supportive and snug. Active fit moves with you on the rockface. Comfy cottton fabric feels great. Integrated shelf bra for support. Flat-lock seam construction eliminates chafe. Apparel Fit: Active. Body: V6™ Stretch Jersey / 90% cotton, 10% elastane.