Sleeping in a bivy sack under the stars is a romantic and relaxing idea as you have a warmer place to stay, especially during cold nights. But what makes buy sacks better than one-man tents? Well, bivy sacks are lighter, this carrying them around is a lot more convenient. They are relatively warmer, too, giving you better sleep. This makes them the perfect outdoor companion, also when it’s cold outside. With bivy sacks, you can get the comfort and flexibility that you need, all in one thing.