The physical company 3 in 1 soft plyo boxes are made from a high density foam and covered with hard wearing non skid vinyl a key benefit is that the foam will absorb some of the impacts during a landing for many athletes and everyday clients one of the potential downloads with plyo and jump training is the volume of stress going through the foot ankle knees and hips these soft plyo boxes decrease that problem the physical company 3 in 1 soft plyo boxes has three different heights to put