Mountain Equipment Ultralite Bivi - Emergency bivouac sack for 1 person

Mietprodukt

Ultra-lightweight protection for emergencies – so small, so important

When you're outdoors – whether on a multi-day mountain tour, solo trekking, or a spontaneous microadventure – every gram counts in an emergency, but above all, every bit of protection matters. This one-person emergency bivouac sack is designed so that you'll hopefully never need it – but if you do, it will make a real difference. The ultralight bivouac sack from Mountain Equipment reliably protects you from wind, rain, and hypothermia if you suddenly find yourself in a critical situation. This way, you stay warm and safe even if your sleeping bag isn't available or you have to wait for rescue.

Fits in any pocket, protects at every moment

Weighing just 110 grams and packing down to a size barely larger than a fist, the Mountain Equipment Ultralite Bivi fits into even the smallest outer pocket of your backpack. And that's exactly where it belongs – ready to hand in any situation. The extremely tear-resistant polyethylene material is windproof and waterproof, and features an aluminum-coated inner lining that reflects up to 90% of your body heat. This means you stay warmer for longer, even when you're not moving. Especially in the event of accidents, sudden weather changes, or unexpected bivouacs, this is a pocket-sized lifesaver.

More than a disposable item – designed with your adventure in mind

Although designed as a single-use product, the Ultralite Bivi can be reused with a little care. Its robust edges ensure greater durability, and the included nylon ripstop stuff sack even offers space for additional emergency equipment such as a whistle, headlamp, or first-aid kit. The bright, high-visibility color increases your visibility in the field—a significant advantage during rescue operations or in poor visibility.

Product features at a glance

✅ Emergency bivouac sack for one person in a high-visibility color
✅ Single use – reusable multiple times with careful use
✅ Wind and waterproof polyethylene material
✅ Aluminum coating reflects up to 90% of body heat
✅ Reinforced edges for longer lifespan
✅ Includes lightweight nylon ripstop bag with space for emergency supplies
✅ Size: 213 cm x 91 cm
✅ Packed dimensions: 7 cm x 8 cm
✅ Weight: only 110 g
✅ Material: outer polyethylene, inner aluminium-coated

For emergencies – not a substitute for a sleeping bag

Important to know: The Ultralite Bivi is not a replacement for a full-fledged sleeping bag. It doesn't have a defined comfort, limit, or extreme temperature rating because it was designed for emergency situations. However, if you unexpectedly find yourself in the cold, it effectively protects you from hypothermia—precisely when it matters most. And that's exactly what makes it so valuable for any trip: It's lightweight, compact, and a true safety net on the go.

Rent easily – plan smartly

You don't need to buy an emergency bivouac sack that you might only need once. Renting is the smart, sustainable solution – and that's exactly where we come in. With our rental service, you get inspected, clean, and ready-to-use equipment without breaking your budget. The Ultralite Bivi is a prime example of this principle: rent safety instead of buying it and storing it unused.

Rent your outdoor gear now for your next adventure – or borrow it exactly when you need it. Being prepared has never been easier.