Therm-a-Rest Sac de couchage Boost 650 20°F/-6°C - Régulier/Large

Avis

• Mark S.

  Note de 5 sur 5

  A Polar Ranger For Warm Weather

  10/21/26

  I have a Polar Ranger for winter camping (which was my first purchase from Altitude Sports) and love the arm zips. I immediately got interested in the Boost 650 when I found that it inherited the arm zips from the Polar Ranger -- a feature that I truly love at night when I want to read or watch a movie on my tablet in the tent. I purchased the Regular-Wide version and after using it in late autumn weather, I wish that I had gotten the regular width. Even with the expansion zipper zipped up, there is too much wasted space that sucks the warmth out of your body. I'd only get the wide version if your body girth makes it desirable. I'm looking forward to trying this sleeping bag out in the warmer months when I think it will shine: there is so much room to move in and you can ventilate via the arm zips. The zippers don't snag very easily -- one of my better bags for this. My only complaint is that I find the the down has a tendency to "bleed" more than other down bags.

• Pamela D.

  Note de 4 sur 5

  Warmth that can be adjusted

  10/19/26

  It is a much warmer sleeping bag than what I'm used to, but I especially liked that you can open up vents on both sides to let some of the warmth out. Roomy enough indeed for side sleepers.

• Danni S.

  Note de 4 sur 5

  Zipper can be improved

  08/31/26

  Overall very good. Like that it's wide and the arm holes. Just the zipper is quite hard to zip when you completely open it and try close again.

• Sarah W.

  Note de 5 sur 5

  Product great, service not

  06/05/26

  The product is great. Unfortunately, Altitude Sports thinks it's appropriate to ship a $500 sleeping bag in a plastic shipping bag, which arrived with multiple punctures and a slice in it. Luckily the sleeping bag wasn't damaged but I'm honestly surprised it wasn't.

• Josee G.

  Note de 5 sur 5

  Le meilleur sac de couchage pour le confort

  05/12/26

  Le meilleur des deux mondes. La chaleur de la momie mais le confort comme dans son lit. Ingénieux le gadget pour la sortie des mains. J’ai dû en acheter un 2e pour un jaloux…. Tissus soyeux, largeur extra pour bouger ou dormir en boule les jambes remontées.

• Vivian K.

  Note de 5 sur 5

  The perfect bag for a claustrophobic hiker

  01/19/26

  I can't speak as to its real life performance, as I have just used it inside my house (in the winter with the door open at night for a few minutes, haha, but not the real thing). What I must speak to is the absolute COMFORT of this bag. I'm not a particularly large person (5'4, medium frame, chubby), but I have always had issues with sleeping bags. As soon as the zipper would start getting near neck-height, I'd panic: my heart rate skyrockets, and I'd have to rip the bag open to breathe and calm down. I can't stand my shoulders being restrained. In this one, I just feel enveloped by pillows. My son called it a marshmallow suit, haha. I can breathe comfortably, roll over without a worry, and there's no panic involved, even with the extra spacer closed. It really feels like a miracle - I thought I'd never be able to go backpacking again. Ideal for those who want space but don't want to compromise on quality or (much) on weight.

• John A.

  Note de 5 sur 5

  Boost 650 Sleeping Bag 20°F/-6°C - Regular/Wide

  01/12/26

  your swiss army of sleepning bags

• Anna A.

  Note de 5 sur 5

  Excellent Bag

  06/08/25

  I dislike how confined I feel in a sleeping bag so I decided to buy this in wide. What can I say. This bag is amazing. It’s very soft and comfortable, great quality zippers and good compression sack. I didn’t use it fully zipped yet as the overnight temperature wasn’t too cold, however it fees very warm. I highly recommend this bag.

• Angelo M.

  Note de 5 sur 5

  Perfect sleep system

  05/10/25

  This fits right in my sleep system. It provides me the best of two worlds, cold and warm weather camping. I love when it's fully open that provides ample internal space. Being a side sleeper, this does not restrict me in any way. Also love the color!