PVC fabric: Reduced skin irritation 

Double stopper. Fixed buckle: It prevents the flaring of the tube, provides a more secure fit.

Practical design.

Precauton:
1.When swimming, avoid to touch with sharp rock.
2.Do not use high pressure automatic air injection pump. Please use the mouth or hand pump.
3.Do not place near the fire.
4. Make sure to use with a guardian.
5.Do not use the rapids of the river and valley .