Plyometrics soft boxes are an excellent way for conditioned athletes to increase and develop their jumping sprinting and explosive power these plyometric platforms are versatile and can meet the needs of every athlete no matter what their level of competition this is a set of stage 1 2 and 3 key features of the escape soft plyometric box set cross linked foam core covered in btek european made vinyl non slip surface for increased grip cross linked foam core the boxes have strong velcro