OOfoam technology absorbs 37% more impact than traditional footwear; Unique footbed design reduces stress on knees, ankles and other joints; Rounded, cupped heel designed to enhance impact-absorption and stability with every step; Raised rim and contoured toe cover for secure, stable fit; Closed-cell foam is machine washable and designed to minimize odor; Height: 20mm; Weight: 12.4 oz (Full Pair)