The prAna Willa Top provides maximum support in flattering style. Chakara performance fabric, adjustable straps, and a power mesh lined interior shelf bra all prepare you for your next yoga practice. Moisture wicking stretch chakara is bluesign approved for environmentally safe production processes. Chakara performance knit. Adjustable elastic straps. U-back design detail. Interior shelf bra with power mesh lining. Maximum support. Fitted. Shell: 93% Supplex Nylon and 7% Lycra Spandex. Lining: 92% Polyester and 8% Spandex. Material: Supplex Nylon, Lycra Spandex, Polyester.