While there is a wide range of excellent bivy sacks on the market, three are regularly rated among the best for solo camping adventures: the MSR AC-Bivy, the Outdoor Research Advanced Bivy, and the Black Diamond Tripod Bivy Bag. Each is designed to provide ultra-lightweight, waterproof protection from the elements for you and your sleeping bag. So, if you’re on an adventure, and you want to leave behind the bulk and weight of a standard tent, one of these bivy sacks is sure to meet your needs.
The MSR AC-Bivy is a low profile bivy sack that weighs in at no more than a single pound. It features tough ripstop nylon with a waterproof, yet breathable, coating to keep the moisture from rain or snow out while allowing the moisture created by your breathing to escape at the same time. Though this sack has a very low profile, the MSR AC-Bivy has plenty of elbowroom and foot space so you, your sleeping bag, and your sleeping pad can fit comfortably inside.
Outdoor Research Advanced Bivy
The Outdoor Research Advanced Bivy is more spacious than the MSR AC-Bivy, but it is also heavier, weighing in at about two pounds and five ounces. Along with the extra weight, however, the Advanced Bivy comes with a dual pole system that provides increased interior space above the head and improved ventilation for a more comfortable night. This bivy sack features 3-layer Gore-Tex Respiration fabric for a breathable yet waterproof exterior, allowing it to perform well in wet conditions.
Black Diamond Tripod Bivy Bag
The Black Diamond Tripod Bivy Bag is yet another step up in weight and comfort. Weighing in at two pounds and 10 ounces, it is the largest of the three bivy sacks described here. An integrated three-pole system provides extra space above both the head and the feet. Additionally, Black Diamond’s ToddTex exterior fabric produces breathable waterproofing to keep you dry no matter the outdoor conditions. As far as bivy sacks go, the Tripod Bivy Bag is a luxury option.