3F UL Gear Tyvek Bivvy Bag

A Tyvek bivvy bag is one of the cheapest and lightest ways to protect your sleeping bag. This 3F UL Gear bivvy slips over your mummy bag or quilt to keep off tent condensation, dirt and splashes, and it adds a bit of warmth by trapping a layer of air.

Tyvek is light, breathable and water resistant. It's ideal inside a tent or under a tarp. In heavy rain without a shelter, you'll want a more heavy-duty bivvy, like the Bushmen Hideout Thermo.

Choose your version

Each comes with a compression sack. It's white, which makes it easy to spot. Use it inside a lightweight tent like the Lanshan 1, and see all our sleeping bags and 3F UL Gear.