The slight difference of having the bug net/ventilation elevated above your face did two things. If you're breaking into the ultralight game, there are some excellent options available that offer decent protection against those surprise rain showers or windy nights. Go Time Gear Life Bivy Emergency Sleeping Bag. How well a bivy ventilates and how much condensation builds up inside is a huge factor in its versatility and performance. However, I wouldn’t advise using one if a blizzard is in the forecast. A modern bivy consists of a 2-tier construction with a durable, waterproof and breathable top usually made of laminate materials like GORE-TEX and a bottom tier made of ripstop nylon coated with an impermeable layer of urethane - the same material used for the tent floors. Please read our Disclaimer. Learn more. A bivy or bivouac sack is a sleeping bag with waterproof, windproof nylon covering. Protect yourself from the harsh weather with this spacious bivy sack. Ideally, select a campsite where one of the open ends is against a bush or large rock. Whether or not to bring a bivy depends on many factors, and everything from weight to the weather forecast to the available space in your pack can influence the decision. How can we improve GearLab? The Outdoor Research Alpine Bivy is one of the best Bivy sack on the market today. JYSW bivy sack is a suitable option for regular hikers and campers, as it is lightweight and versatile. We only make money if you purchase a product through our links, and all opinions about the products are our own. If you pack along some para-cord, you can elevate the front flap over your head creating a little extra space. Wondering which shelter is the best? Only the highest quality bivy sack can provide a reliable sleeping arrangement in all conditions. This survival bag is both durable and reusable. A waterproof nylon sack protects the bag, which also comes with a 550-pound nylon core drag string that can used to secure or repair gear in a pinch and a 120-decibel emergency whistle. If you plan to use your bivy sack for camping, increase your comfort by: placing a bottle filled with hot water in the core zone (your crotch or arm pit area) for extra warmth, use a sleeping pad underneath for extra cushion and pull the drawstring around the opening snugly around your head to avoid breathing into the bivy and to seal out moisture. The clever set of features includes a zippered bug screen, the ability to elevate the bivy face without a pole, and a low overall weight make this piece of equipment stand out against the competition and ensure it can compete with some of the more expensive models. Indeed, at first glance, a bivy is just a micro-tent, lighter, and smaller with all the protection and less bulk. It retains 90% of the body’s heat and keeps you comfortable all night. Each of our reviewed products has unique characteristics that might create a compelling reason to consider it for your next outing. The TACT is for those wanting to go fast and light and reserve crawling into the bivy for emergency situations. Bivies are still easier to set up than even the best UL tents and tarps, especially if you're looking for a solo shelter equipped to deal with the stormiest weather, and mainly winter snow conditions. Its made for emergencies, small and lightweight. Along with user reviews from Amazon. " Luckily, we did the hard work for you and chose according to the following criteria. If we were recommending a bivy solely upon its price-to-performance ratio, this might be the highest-rated bivy we have ever tested. Some of the models have poles that could be added to the same stuff sack or stored in your pack separately. High quality seams, stitching, and zipper. It’s super lightweight at just seven ounces, packs down to seven by four inches, and is 88 inches long when it’s totally unpacked. At just under 2 pounds you get a lot of Bivy sack while keeping your pack weight low. 11 Best Bivy Sacks 1. Make sure you keep your head (and breathing) out of it, as condensation easily builds up to puddle proportions. Three foot by seven foot size, and weights 5.8 ounces. If you’re happy with carrying an extra pound but crave for wiggling space, a bivy shelter comes with an expanded headspace and roomier  shoulder and leg areas.