HD Modular Foam Plyo Box | Set of 4High Density Modular Foam Plyometric Box Set Of 4 The Fitness Hero Plyo Boxes Set includes four boxes measuring 15cm, 30cm, 45cm, and 60cm, crafted from high density foam and finished with durable, non slip vinyl. The foam construction cushions landings, reducing impact stress on the feet, ankles, knees, and hips during plyometric and jump training. Ideal for building explosive power and reactive strength, or for intense cardio workouts favored by