5 Star Emergency Medical Supplies recommends the best lightweight bivy sack shelter (also known as a bivouac sack, bivvy bag, bivi bag, bivy shelter or just bivy). It is a lightweight, waterproof shelter, and an alternative to traditional tent systems. It is used by climbers, mountaineers, hikers, ultralight backpackers, soldiers and minimalist campers. Our supplier, the Survival Camping Store offers a wide range of the bivy sacks.
Bivy Sack Shelter Protects User from Weather
A bivy sack at its barest is a thin waterproof fabric shell (for example, made from lightweight silnylon) designed to slip over a sleeping bag, providing an additional 5 to 10 °F (2 to 5 °C) of insulation and forming an effective barrier against wind chill and rain. A drawback of a simple bivy sack is the humidity that condenses on the inner side leaving the occupant or the sleeping bag moist. This problem has been alleviated somewhat in recent years with the advent of waterproof/breathable, such as Gore-Tex, which allow some humidity to pass through the fabric while blocking most external water. Another solution is the use of an inner vapor barrier liner bag, for example a silnylon sack, to prevent body moisture from entering and condensing in the sleeping bag.
A traditional bivy sack typically cinches all the way down to the user’s face. It leaves only a small hole to breathe or look through. More recent developments in high-tech breathable fabrics have resulted in the creation of Gore-Tex Exchange Lite. this is an air permeable version of the fabric. It can be safely zipped up around the user’s head in order to shut out the elements completely. The fabric not only allows moisture to escape, but also the carbon dioxide exhaled by the user.
Bivy Sack Serves as Compact Emergency Shelter
The Survival Camping Store also provides a bivy shelter. It is a compromise between a bivy sack and a single-person tent.
Many campers gladly accept the increased carrying weight of a bivy shelter for the perceived increase in comfort. The traditional bivy sack still holds its place among mountain climbers and backpackers. It is frequently carried as a compact emergency shelter on long or dangerous hiking or hill walking expeditions and high mountain climbs.
Our bivy shelter is sufficiently taut to keep the fabric off the occupant inside to prevent condensation from soaking the bedding and provides some additional breathing room around the head.
Bivy Shelter Popularity
In the UK, for example, bivy shelters have become very popular among fisherman, who, in pursuit of their quarry, fish throughout the night. This upsurge in popularity has increased competition among manufacturers and designs have become more advanced.