【Soft Foam Jump Box for Safer Training】Each plyo box features 120D compressed sponge foam and a non-slip polyvinyl chloride cover, protecting your joints and shins greatly for safer plyometric workouts, HIIT, and step-up exercises. 【Stackable Design for Space-Saving】The stackable design of jump box keeps your workouts flexible, whether you have limited space or are designing a portable setup. The flaps lock each box securely for safe jumping, squats, and balance training at any skill level. 【Versatile Heights for All Levels】Available in 6 inch, 12 inch, 20 inch, you can customize your training by stacking them together with sturdy flaps. The height combination design offer more options for beginners, kids, or athletes working on vertical jumps, box squats, tricep dip and push up. 【Durable & Stable Platform】The plyo boxes is built to endure substantial impacts and can support weights of up to 500 LB, encased in a durable, wipe-clean vinyl exterior that stands up to tears and moisture. The side handles ensure easy portability between indoor workout and outdoor workout. 【Home Use & Gym Use Equipment】The plyometric boxes are perfect for commercial or home use. The large surface 28" L x 28" W provides a safe and stable platform for strengthening and improving overall core stability through continuous jumps and exercise routines.