Sierra Designs Ultralight Backcountry Bivy Bag for Camping and Hiking

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1. mel Verified Buyer – 5 May 2024

   This bivy looks awesome! I was really happy with how small and light it packed down. It looks a little questionable with how water proof it is but I guess I’ll find out soon enough. I plan to use a small tarp with it anyways. If your a big guy id definitely get the large that this model comes in.
   

2. Mark Verified Buyer – 13 May 2024

   Glad to have this bivy. The brand caught my eye first and it gets good reviews on all the top ten lists I’ve seen including YouTube videos. It’s very thin tent like material. Not designed so much for warmth but I’m using it in conjunction with my 800 fill power down mummy bag so no worries there. My only complaint is the zipper quality could be better but if used cautiously they should hold up just like a tent. Pros are that it’s very spacious and ultralight. I got the long version as I’m 6’3 and 205 lbs. It fits my 88″ mummy bag, an inflatable pillow, and my ultralight sleeping pad fits too. I’ve added links below to the bag, pillow, and pad I’m using. It stuffs down to about the size of a 1 liter water bottle. Hyke & Byke Eolus 0 Degree F 800 Fill Power Hydrophobic Goose Down Sleeping Bag with ClusterLoft Base – Ultra Lightweight 4 Season Men’s and Women’s Mummy Bag Designed for Backpacking https://www.whatcampingtent.com.com/dp/B06XS52W8W/ref=cm_sw_r_other_apa_i_ky4yFbMRDBJXY TREKOLOGY Ultralight Inflating Travel/Camping Pillows – Aluft 1.0 Compressible, Compact, Inflatable, Comfortable, Ergonomic Pillow for Neck & Lumbar Support While Camp, Hike, Backpacking https://www.whatcampingtent.com.com/dp/B073XGRR42/ref=cm_sw_r_other_apa_i_wz4yFbSGQ7DJ0 ECOTEK Outdoors Insulated Hybern8 4 Season Ultralight Inflatable Sleeping Pad with Contoured FlexCell Design – Easy, Comfortable, Light, Durable, Hammock Approved – Sub Zero Temp Rating https://www.whatcampingtent.com.com/dp/B07GZJDZWC/ref=cm_sw_r_other_apa_i_XB4yFbMWA74DV This Sierra Designs Bivy is a great product and I’d very much recommend it. Enjoy.

   

3. Robyn Verified Buyer – 25 June 2024

   Super light and packable. I just used this on a mild weather bikepacking trip and was very pleased with it. I did have a little more condensation on the inside (especially in the foot area of the bag) than I was hoping for, but not enough to be problematic. The bottom is not as robust as what I have used in the past, but it did not have any punctures to my sleeping pad.
   

4. parajared Verified Buyer – 25 July 2024

   It’s lightweight, 433 grams on my kitchen scale and small. My entire sleep pad fits inside and it doesn’t seem to leak when the garden sprinkler “rains” on it.

   I camped out on a July Arizona night in it and it’s warm. I wish the bug net opening part was a bit bigger but it works great at keeping the crawly insects off you.

   It seems to turn into a sauna inside with the waterproof flap closed so more of a use with flap open only except when it’s raining kinda deal.

   Update 9/2024: I took it out backpacking in rainy conditions and the night was cool enough that having the rain flap closed all night wasn’t a big deal “sauna” wise. Condensations still formed inside due to my breath but my bigger concern is that had the rain not let up I’m not sure how I would have gotten out of it and still kept the interior dry.
   

5. Christopher Brown Verified Buyer – 20 October 2024

   This is a fantastic Bivi and their support is also way above par. It’s light and performs well.
   

6. Dan Verified Buyer – 25 October 2024

   Bought to use as sleeping bag cover, possible overkill as it seems to be more robust & much better quality than the slightly less expensive black diamond starlight.
   Last one in stock but item is in A1 condition. US to UK 6 days standard..

   Verdict- Bluddy marvellous !
   

7. MATTHEW T MILLER Verified Buyer – 12 March 2025

   Pros: It works, it seems well made, and it will keep you dry.
   Cons: The tent fabric does not breathe well at all. if it is raining, you have to get creative to get fresh air without letting rain into the bag.

   This is good for emergencies, or camping in cool weather with no chance of rain.
   

8. Unhappy camper Verified Buyer – 13 March 2025

   It doesn’t appear to be waterproof. First night, light rain..woke up with sleeping bag wet, eventually right through..inside of bivvy also wet. Very disappointed.
   

9. Wheresthekaboom Verified Buyer – 19 March 2025

   I was worried it would be restrictive but it has plenty of space. I can lay flay and put my feet flat while my knees bent and it has plenty of clearance. I can sleep on my side and stretch my legs anytime.