The 3-in-1 Ziva Plyometric Jump Box Box is a durable workout step platform made with strong and sturdy materials ready to take a beating. This softbox can support up to 350 lbs. of weight and will never back down from an intense workout. It features 3 varying heights per side to allow progression in your workout sessions. Use this workout box to level jump goals as you build your muscle strength and progress your workout. The core is made of PE foam that provides a soft low impact platform for your high jump exercise. The non-slip outer shell is made of durable PVC plastic for stability. No more bruises on your legs from jumping on hard wooden boxes. No tools to set up, no assembly, nothing to take the energy out of your exercise mood. The adjustable height allows lower-intensity workouts for beginners, to mid-level, and a higher-intensity workouts for more skilled athletes. When you choose ZIVA, you not only benefit from the high-quality exercise and fitness tools available, but you also get a premium experience. Customer service is at the core of our business and we strive to offer fitness equipment that maximizes your health and service, leaving you wanting to explore our sports and exercise equipment catalog. The ZIVA Difference. It's the ZIVA difference stemming from a bold dream, a mountain of Taoist philosophy and so much love and dedication that has expanded our global fitness brand into more than 80 countries. Experience the Zen now.