Everything Yoga 36'' Half Round EVA Foam Roller Designed to help improve balance in Pilates mat exercises, these durable high-density EVA foam rollers have excellent memory characteristics - meaning they will regain their original shape after being compressed. This makes them ideal for abdominal and spine stretches in yoga and massage therapy, and also therapeutic myofascial release. The rollers have rounded corners for added comfort. Comes in both 12'' and 36'' lengths. Use round rollers for stability exercises, and for alignment and myofascial release. Use half round rollers for balance exercises.