1. The bottom of the back (color random delivery) is waterproof PVC, moisture-proof and wear-resistant 2. Surface flocking process, delicate and smooth, skin-friendly and soft, dirt-resistant and easy to clean 3. Double-layer anti-leakage air plug, not easy to leak 4. Multi-circle design at the bottom, better suction to the ground, stable and not easy to move 5 Material: PVC 6. Applicable scene: office, home, outdoor can be 7. Dimensions: sofa about 92x105x36cm, step stool about 62x32cm 8. Description: not inflated for delivery, please purchase inflatable tools by yourself