- Silky soft 2x1 Promodal RIB used exclusively to provide style & comfort & -- providing awesome range of motion for lounging, the beach& excercise. Softer yet more durable than cotton, with superior moisture wicking - this short will last 4 years! Bamboo green thread contrast. "4" logo mark at top. "Compression" look without the tight grip... perfect 4 layering!