Bivvy bags
The bivy bag, also known as a sleeping bag cover, is an ultralight and compact piece of hiking gear that's increasingly popular among outdoor enthusiasts. It provides extra protection for your sleeping bag, while significantly cutting down the weight and bulk of your kit.
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Recommended price
£61.51
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£49.19
Designed to be as light and compact as possible so as not to overwhelm you, the Escape Lite Bivv is a survival overbag that also offers strength, breathability, waterproofing and warmth.
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£21.91
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£17.51
The SOL Emergency Bivvy is an emergency bivvy, a survival overbag designed to reflect body heat and protect you from the vagaries of the weather.
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Recommended price
£74.71
-15%
£63.27
Lightweight, sturdy and waterproof, the SOL Sol Escape Bivvy With Hood overbag features a hood to keep your sleeping bag dry in rainy conditions during alpine excursions.
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Recommended price
£52.71
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£42.15
The Baikal Liner High Rise overbag from Millet optimizes your thermal comfort thanks to its sarcophagus shape and high-performance synthetic fabric.
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What is the purpose of an ultralight sleeping bag cover?
The bivy bag serves several functions:
- Weather protection: It shields your sleeping bag from rain, snow, and dew, extending its lifespan.
- Thermal insulation: It creates an extra insulating air layer, boosting your sleeping comfort—especially in cold or windy conditions.
- Weight and bulk reduction: A bivy bag is much lighter and more compact than a tent, making it a top pick for ultralight backpackers and bikepackers.
- Insect protection: Some models come with an integrated mosquito net, providing effective defense against biting insects.
Do you need a bivy bag for camping?
Using a bivy bag isn’t mandatory for camping. A trekking tent offers much more protection and space than a simple sleeping bag cover. However, a bivy bag can be a great alternative when you need to go tent-free for true ultralight travel.
Gore-Tex bivy bags: reliable rain protection
Gore-Tex bivy bags deliver outstanding waterproof and breathable protection. Just like mountaineering jackets, their waterproof rating is measured in Schmerber using a water column in mm. The higher the value, the better the cover resists heavy rain.
The Gore-Tex membrane lets moisture vapor from your body escape the sleeping bag, while blocking water from getting in. Plus, the side zipper and all seams are sealed to prevent any leaks.
It’s the go-to solution for hikers seeking maximum protection from the elements.
Models designed to manage internal condensation
Condensation is a natural phenomenon that occurs when water vapor in the air meets a cold surface. To limit condensation inside the bivy bag, some models feature ventilation systems or specific materials that help wick away moisture. Millet bivy bags, for example, have a footbox vent system that works like a bellows, letting the bag breathe throughout the night with every move you make.
Emergency bivy: an essential backup shelter
Known for their product quality, Sol offers emergency bivy sacks that are both tough and lightweight. Made with premium materials, these bivy sacks deliver optimal protection while staying compact and easy to carry. Whether you’re hiking in the mountains, trekking through the woods, or heading out solo, the Sol emergency bivy is a smart investment for your safety.
Trusted brands like Millet, Salewa, Sol, and Outdoor Research
Many top mountain gear brands offer high-quality bivy bags. Among the most recognized are Millet, Salewa, Sol, and Outdoor Research. These brands provide a wide range of models, tailored to different uses and budgets.
In summary, the bivy bag is a versatile, high-performance piece of gear that can be extremely useful for hikers, mountaineers, and anyone bivouacking under the stars. It offers solid protection from the weather while cutting down on weight and pack size. By choosing a model that matches your needs and conditions, you’ll get the most out of your outdoor adventures.