Breathing Bag 4 sizes (0.5L, 1L, 2L, 3L)

Breathing Bag 4 sizes (0.5L, 1L, 2L, 3L)
The breathing bag comes in four sizes (0.5L, 1L, 2L, 3L), has no pungent smell, a soft handle, smooth touch, a 22mm standard connector, a netted and smooth surface without pinholes or dirt, and is mainly green with customized color options available.