floaty

US /ˈfloʊ.t̬i/
UK /ˈfloʊ.t̬i/
1.

trôi nổi

A floaty material is very light and moves in the air:

:
floaty dresses
1.

trôi nổi

a hollow, ring-shaped piece of plastic filled with air, that people who are learning to swim wear on their arm in water to help them float:

:
At age three, he ripped off his floaties and jumped into the deep end.