The Grind Plush Plyo-Box is designed for people who want to box jump, step up, split squat, box squat, and more without worrying about injury from a failed rep. The inside weight distributes to the bottom of the plyo box for added stability. This plyo weighing 30lb is not your ordinary light weight foam plyo that tips in the wind!   Specifications: 16"x18"x24" 30lb Ultra density outer foam Sweat-proof grippy vinyl shell