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High water-resistance, durable fabric build, high-quality seams, stitching, and zipper make this a sturdy choice. Olive drab green, so it blends in with the environment. Resists punctures and tears and reflects back 70% of body heat.
Is a bit tight and small; may not be ideal for taller users.
Lightweight and waterproof, this bivy sack retains heat well and includes a compass and whistle for additional survival support. Sealed seams and tear-resistant coating keep you dry and warm in emergency situations.
Compass may not be incredibly accurate.
Available in a 2-pack; each bivy sack comes with its own carry bag. Constructed of durable, double-sided Mylar material, which is waterproof and windproof. Reflects back 90% of body heat and packs up small and light.
There are no zippers or cushioning with these.
Comes with a nylon sack for storage, a 120-decible emergency whistle, and a 550-pound nylon-core drawstring. Ultra-lightweight and compact. Its 26um Mylar resists tears and punctures while reflecting 90% of body heat back to you.
Bag isn't very breathable, allowing condensation to form on the inside.
Available in Safety Orange or Tactical Green, the material is an ultra-lightweight, reflective polyester film that reflects 90% of your heat back to you. Tear-resistant, as well as windproof and waterproof with reinforced, taped seams.
Some reports that the material here is very thin and rips easily.
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A bivy or bivouac sack is a sleeping bag with waterproof, windproof nylon covering. It can keep moisture and cold out even in snowy weather. It’s useful to hikers and climbers and for survival during natural disasters. Bivy sacks are made to withstand rough weather conditions, though some are more durable for repetitive use while others are suitable only for emergency situations. Bivy sacks tend to pack up small and weigh little for easy transport over long distances. All help keep your body heat in with some having body-heat reflection ratings between 70% and 90%. Not all bivy sacks can accommodate tall or large body sizes. Some come with extra survival tools like a compass or emergency whistle.