This crescent shaped float keeps you afloat while you can freely swing and stretch your arms during swimming. Inflate it simply by blowing air into it through your mouth.
Swimming made easier as the end of the float is pointed backwards making more room for arm movements.
Airbag separated into two chambers on each side, improving safety during the use since if only one side has a leak, the whole float will still be working.
Manual inflation through blowing air via the mouth.
Full size (inflated)