Black Camping Tarpaulin Waterproof Backpack with Air Valve Welding Technical

1. Plastic adjustment fastener reduces the weight of bag and more ergonomic.
2. Air valve keeps your clothes dry and hole to bleed air from the bag when you want to put more items inside.
3. Air valve keeps the air inside of the bag so that it could use for flotation in the water.
4. Strength waterproof materials ensure you could use it any situation.
5. Reasonable compartment design allows you to put more things in the bag
6. Front plastics rings could connect other bags or small items with hook