Sitka Kelvin Aerolite 30 Sleeping Bag

Item No. 10496-40086-PB
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Product Description

The Kelvin Aerolite 30 Sleeping Bag is a multifunctional layer for active time in camp, cold glassing sessions or dreaded midnight nature calls. Synthetic PrimaLoft® Gold Insulation with Cross Core™ technology replicates the aesthetics and performance of down insulation, but with warm-when-wet performance. Featuring a 30-degree warmth rating, it's designed to be an extension of your SITKA clothing systems for full-season performance, even in the wettest conditions. Jacket-like features include zippered, functional armholes; contoured shoulders and hood, and a center-front two-way zipper.

• Synthetic PrimaLoft® Gold Insulation with Cross Core™ technology replicates the warmth and compressibility of down, but with the benefit of warm-when-wet performance
• Lightweight insulation (35% recycled) is infused with silica aerogel, a nearly weightless material that's composed of more than 95% air and acts as additional thermal insulation
• 20-denier polyester face and backer
• Durable water repellent finish resists precipitation and prevents face fabric from wetting out
• ISO 23537, 30-degree comfort rating; designed to be worn with other layers in your SITKA clothing system for colder conditions
• Contoured shoulders and hood for a shaped and functional jacket-like fit when active
• Center-front two-way zipper
• Armholes positioned for functional mobility; baffled draft tubes seal in heat
• Stowed hook at bottom of bag connects to midlength interior loop; shortens the bag for walking
• Shaped footbox provides even warmth around your feet

Total weight: 38 oz.

Customer Reviews

4.4 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
I tested this sleeping bag out this weekend. I slept outside under the stars and never once felt cold as the temperature dropped to a breezy 40°F. In fact, I was a little too warm at first. The zipper down the middle and the zippers for arms is an absolutely genius design. I was able to reach for my water or headlamp without having to open up the sleeping bag and let out all the heat. Whenever I needed to get up in the middle of the night to answer nature's call, I simply opened up the bottom, hooked the bottom up, and walked out to do my business. The next morning I spent the greater part of 3 hours walking around the cold campsite with my sleeping bag while everyone else was bundled up shivering. I was skeptical at first, but this sleeping bag proved its worth very quickly.
November 16, 2021
Originally posted at
Rated 5 out of 5
Love it!!!! It works so well with my clothes and kept me warm all night in -22°F weather.
October 8, 2021
Originally posted at
Rated 5 out of 5
This is the most important change to sleep systems in the last 10 years. Watch as everyone else starts to copy Sitka's brillance. Maybe a future down version please. I'd love to help test it.
October 8, 2021
Originally posted at
Rated 4 out of 5
I agree with the first review. Not all of us like to crawl into bed every night in our sweaty clothes. Some nights OK but not every night. A bit more fluff would be good.
September 2, 2021
Originally posted at
Rated 5 out of 5
Great product! It is Sitka so it is high quality and is great for those who do not like the strait jacket feeling when sleeping in a mummy bag. Wearing my puffy jacket it is a game changer for me!
September 1, 2021
6 months ago
Rated 2 out of 5
Wanted to love it
I am somewhat of a sitka fan and was excited to try the bag. however, after 4 not so good nights,

I am 5' 10" a regular bag is to small if you sleep on your stomach.
the bag is cut pretty tight. I did not know what claustrophobia was until I used this bag.

some of my other issues.
Its sold as a 30 degree bag, when in fact it is a 38 degree bag.
it is far heavier then other synthetic bags of the same class.
it is cut very snug,
unfortunately i am giving up and returning; not a good value and one of Sitka's few epic fails in my opinion.
July 27, 2021
Rated 5 out of 5
The first reviewer doesn’t ‘get it’! This bag is meant to function with your clothing system so you don’t have to have a -(30) degree bag that is heavy… you use the puffy to augment the bag since you’ll need your puffy as an integral part of your system — why don’t people pay attention to the functionality and design?!
June 23, 2021
Originally posted at