Absolutely the best! MDUSA Soft Impact Plyo Boxes are made from high density foam and covered with 18oz.vinyl. The bottoms and tops are 30 oz. non-skid vinyl. Each box has two handles for easy repositioning and Velcro flaps for stability when stacking. Stack any combination together for desired height. Stock colors are Red, Yellow, Blue, and Gray body with black top. Heights available are 6", 12", 18" and 24". All boxes are 30" X 36".