透气 (tòu qì): to flow freely (of air); to ventilate; to breathe (of fabric etc); to take a breath of fresh air; to divulge

Wearing this kind of cotton clothing in summer is very breathable; it won't make you feel stuffy and hot.

The design of these sneakers is very breathable; even after running, your feet won't sweat.

The window in the room is too small, so it's not very ventilated, making it especially stuffy in summer.

This fabric is both light and breathable, making it very suitable for summer shirts.

The top of the tent has a breathable mesh layer, so you won't feel stuffy when sleeping at night.