Cobian sandals come in whole sizes only. For half sizes, move up to the next whole size (e.g., 8½ to 9) for optimal comfort. Synthetic leather strap. Lightweight, squishy EVA top-sole. Multiple density footbed with full arch support. The Bethany Puka — "Opening" in Hawaiian — Features a puffed synthetic leather strap with extra comfy EVA padding. As part of Bethany Hamilton's signature collection, a portion of proceeds supports the Beautifully Flawed Foundation.