Bivy sacks are sometimes known as bivouac sacks or bivvy bags. They are ultra lightweight shelters made for mountaineers or minimalists. People choose a bivy sack over a tent because they are easy to carry and quick to setup and pack up.
If you’re constantly on the move, a bivy may interest you. However, if you need a comfortable sleep at night, or if you hate condensation, you should still consider a tent.
But no worries, we will still talk about bivy sacks in this section so you can decide whether you want to go ahead with them or not.