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Rated 4 out of 5 by from Good piece of gear I used this bivvy while waiting outside for a track meet venue to open. It was minus 1 with wind chill (mind you, this bag isn't rated for nearly this low a temperature.). I had a full set of winter clothes on including an electric shirt and thermal bottoms. I had on heavy wool socks and hiking boots. The wind was about 9-10 mph. My feet were getting cold so I got into the bag. Immediate relief from the wind and I actually felt my lower half get warmer. I was outside for over 2 hours, but I would not have been able to endure that long without the bivvy.
Date published: 2016-02-15
Rated 4 out of 5 by from Emergency ready! I carry this thing even when I go to school. It comes with a nice stuff sack that has spare room to fit a fire starter, a compass and a pocket knife. I haven't used it in a real emergency but I tested it once and I feel better knowing that I have it in my pack or car all the time.
Date published: 2011-11-08
Rated 5 out of 5 by from UPDATED REVIEW. So this is an update on the past review. Since I bought this bivvy, I've had to use it twice in real emergencies. The first one was guiding a river trip for children summer camp when we got hit by a thunderstorm and we were forced to get out of the water. It took the storm a little longer to pass and had to use the bivvy to keep the kids warm until it was over. Second time was not too long ago when my car broke down in the mountains right where i had no cell phone service. I had nothing but street clothes and the bivvy in the car. Temps dropped to the low 20's and I had no other option than to get in it. I warmed up in no time and was able to sleep. I woke up in the middle of the night and got out and used it as a blanket for better ventilation as not to get my clothes wet in condensation; I had to hike out in the morning and wet clothes while cold and windy could easily cause hypothermia whenwearing cotton. This is a survival piece of equiepment, It's supposed to have that much condensation in order to keep you warm without any other clothes or liner in case of an emergency. Once your body releases enough heat to warm up the space in the bivvy, vapor will cease and so is new condensation unless you keep breathing inside the bag. IT WORKS AS INTTENDED and you must use it properly for what it is and not as a replacement for a proper outdoor sleeping system..
Date published: 2013-03-04
Rated 5 out of 5 by from Must have Recently got this as a gift for my outdoor and camping trips and I'm glad I did. Went on a camping trip just recently where the weather turned very quickly and we were hit with a blizzard out of nowhere. This was able to keep me warm enough in the below zero temperatures to wait for a break in the storm and get back to safety. I would recommend this to anyone as it quite frankly did save me.
Date published: 2016-10-17
Rated 2 out of 5 by from Condensation Used SOL bivvy with and without silk liner bag as ultralight sub pound summer sleep system. Some wind protection, marginally warmer than foil survival blanket due to fibrous layer inside. Condensation very noticeable, soaks into fiber layer despite foot vent, adding to cold. For this purpose have switched to expensive down quilt plus breathable water resistant bivy for total 1.5 pounds (3x heavier, 13x price of SOL) which provides much greater warmth, zero condensation, full suspended-off-face enclosure, bug protection and variable temp adjustments, optionally supplemented with a 0.5 lbs tarp/poncho. Still carry traditional foil survival blanket on all outings of any length, much more compact than SOL bivvy. In first aid situation, bivvies can be hard to get around immobile patient and reduce access to body, hence favor blankets and zip open bags.
Date published: 2011-11-10
Rated 5 out of 5 by from Excellent bivy I have used this bivy for many years mostly to extend the range of my down sleeping bag. The first time I used it I was caught out in a very windy blizzard and put my bag into the bivy under my tarp. The wind howled but I was warm, dry and snug. I have since used the bivy with my bag inside to extend my sleeping bag warms. I have a 32 degree bag and with a silk liner and this bivy I was warm down to 5 degrees. Condensation happens but it is manageable and this bivy is 100% waterproof. Excellent product.
Date published: 2013-10-08
Rated 4 out of 5 by from Excellent for emergencies I have used several bivvies in different ways. I think this is the lightest one you can get that is durable. I think it is important to keep something like this in your daypack pack in case you get lost, injured or come upon someone who is in need of help.
Date published: 2017-10-27
Rated 5 out of 5 by from Great for every outing I demonstrate these bivvy bags in each of my wilderness survival classes. Our students are always amazed at how quickly they become warm once they are inside. The SOL Thermal Bivvy is small and light enough that you will not hesitate to take it along on an outing and strong enough to survive some pretty tough use. I personally carry one in each of my vehicles and another in my day pack. A great product and a "must have" for the adventurer.
Date published: 2013-10-08
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Questions & Answers

Does the SOL Thermal Bivvy open up all along sides to open up as blanket?  Basically are three sides velcroed?  Does it build up condensation inside like the seam sealed bivvy?  Thanks.

Asked by: voipkam
​This bivy does not open up fully to make a blanket. The top is completely open, however the 2 sides only Velcro on the upper section. The foot box opens up to help assist with ventilation and any condensation build up.
Answered by: REIservice
Date published: 2017-12-21

Can you open this bivy out flat to use as a blanket or ground cloth?

Asked by: Ella Belle
This bivy is sealed together along the sides so you cannot open it and lay it flat.
Answered by: REIservice
Date published: 2017-06-01
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