Adventurous women know it's key to keep the body's core warm and dry. The Balance Support Bra's superior moisture managing skills take that job seriously. This Merino wool bra is also soft, comfortable, and naturally elastic so it won't bag or sag even after many washes. Pick this bra for your most demanding athletic pursuits, its racerback design and double layer construction has got you covered. Strategic body mapping for comfort and support. Double layer for support. Racerback design. Seamless light-moderate support - best for A, B, & C cups in low-medium impact activities. 63% Wool, 32% Nylon, 5% Spandex. Weight:.14.