Ⅰ. Material Safety
- The main body is made of natural rubber, without any pungent odor. It has good elasticity and resilience and is not prone to cracking.
- The stopper is preferably a PP plastic one, which is non-irritating, does not rust, and does not leak liquid.
- The fabric cover is selected from diving material or cotton material, which does not shed fibers or irritate the skin.

II. Structural Safety
- All the water stoppers are installed, making it easier to flip over without causing water leakage, and it is safer.
- The water stoppers and plugs provide a double seal, ensuring a more stable prevention of leakage.
- Reinforced stitching lines are added at the bindings and edges, making them less likely to come loose over time.

III. Safety Usage
- The water temperature should not exceed 60℃. Do not use boiling water as it may damage the rubber.
- Only fill the container to 2/3 of its capacity to allow for air venting. Avoid over-inflation or explosion.
- A cloth cover must be used instead of direct contact with the skin to prevent cold burns.
- Elderly people, children, and bedridden individuals need someone to supervise their use.

IV. Testing and Certification
- Must be carried out: Tensile test, leakage test for sealing, aging test.
- For the EU: CE, REACH; for other countries, follow local requirements.

V. Preservation and Lifespan
- When not in use, empty the water and dry it. Apply talcum powder/silicone oil to prevent sticking.
- Store horizontally, avoiding heavy pressure, direct sunlight and proximity to heat sources.
- Replace every 1-2 years during normal use. Stop using immediately if there are cracks or stickiness.

VI. Cautionary Reminders
- Do not use salt water or medicine solution as they will corrode the rubber.
- Do not heat with a microwave or burn with fire.
- Do not use if there is any damage or leakage.
