1. 360-degree surround, evenly divided pressure and decompression, comfortable and not tight 2. With reflective stripe design, it is safer to travel at night 3. The bust can be adjusted properly, easy to put on and take off 4. Design with pockets on both sides, easy to carry toys, food, etc. 5. Waterproof fabric, easy to clean 6. Lined with interlayer mesh, ventilated and breathable, comfortable and warm 7. Material: nylon, mesh 8. Size: S/M/L/XL 9. Weight: S about 175g, M about 197g, L about 300g, XL about 320g