Have you looked at tarptents? They aren't tarps. They have bugnetting. People get them instead of tarps because of bugs.

Some of the tarptents do indeed adjust up and down to allow or curtail breezes, as well.

They do require proper setup - but all tents should be set up properly, without sagging, using stakes and enough guy out points that you get ventilation - otherwise you'll be getting a lot of condensation inside. Tents are sometimes used because the users think they will be warmer. Tents should not be considered additional warmth - rely on the sleeping bag and pad for that, ventilate the tent!
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