3F UL Tyvek Bivy

3F UL GEAR Tyvek BIVY is designed to use over your sleeping bag  with a tarp or a single skin tent. It can also be used as an emergency bivy in the snow.

It is light, breathable, water resistant, and can protect your sleeping bag from condensation. It also keeps your sleeping bag from getting dirty, and adds some warmth and wind resistance to your sleep system.

The 3/4 zipper  makes for easy access and the box foot design means your feet stay warm and comfortable.