Sturdy and Durable. 3 Adjustable Height Levels. Textured surface is non-slip. It is lightweight and easy for you to carry. The stackable risers can be easily stored underneath the platform that you can store it under your bed or sofa. Perfect for aerobic workouts and calisthenics. You can perform planks, burpee jumps, crossovers, knee up, push-ups, sit-ups and more.