The Soft Jump Box Set is ideal for all environments, ensuring safety, and minimizing injury. The soft jump boxes are a nice alternative to wooden jump boxes. Wooden Jump Boxes are nice and firm, but you can really injure yourself if you trip on the jump box. The Stackable Soft Jump Box is made from high quality foam, which is still firm. Many other Soft Jump Boxes are too soft, which means that the person using the jump box can become unstable.