Can be folded and stored, easily occupying no space. Thick folding components, easy to fold, refuse to break. High-density thread technology to avoid long-term deformation. Silent spring, silent footpad, double protection, can jump at any time. Safe rounded triangle ring to prevent scratching the foot and the cover. Reinforced waist drum spring, surface electroplating, elastic and tough, not easy to rust. High-quality wear-resistant bouncing cloth, strong and durable, breathable and waterproof.