Sea to Summit Reactor Midweight Sleeping Bag Liner

View the 3 reviews with an average rating of 4.7 out of 5 stars

$74.95 – $84.95

Boost your sleep system warmth up to 11°F without adding bulk. This Sea to Summit sleeping bag liner uses advanced Thermolite® Pro tech to trap in body heat.

Thermolite® Pro technology uses infrared-absorbing ceramic pigments and hollow-core fibers to trap body heat, adding up to 11°F of warmth, with minimal bulk
Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
Stretch-knit fabric fits any shape sleeping bag
Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
HeiQ Fresh odor control technology keeps the liner fresh after extended use; this helps extend your sleeping bag's lifespan by reducing wash frequency
Snap connectors at the shoulders easily integrate with Sea to Summit sleeping bags (not included) for quick, hassle-free entry and exit
Machine washable construction simplifies care and reduces wear on your sleeping bag over time
Quick-drying and easy to clean
Crafted with certified recycled fibers to minimize environmental impact

Imported.

View all Sea to Summit Sleeping Bag Liners

Best Use	Backpacking
Sleeping Bag Shape	Mummy
Added Warmth (F)	Up to 10 degrees
Added Warmth (C)	6 degrees
Stuff Sack Size	7.5 x 4.5 x 4.5 inches
Material(s)	Liner: 100% postconsumer recycled polyester; stuff sack: 100% polyester
Dimensions	Short: 70 x 31.5 inches Regular: 76 x 31.5 inches Long: 78 x 31.5 inches
Weight	Short: 11.6 ounces Regular: 12.3 ounces Long: 12.5 ounces
Sustainability	Contains recycled materials

4.7

View the reviews with an average rating of 4.7 out of 5 stars3 Reviews

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Rated 5.0 out of 5 stars

4 weeks ago

The Reactor sleeping bag liner is very soft and feather light on your skin, I barely felt it. The added warmth was subtle and felt just right without over heating you. I tend to sleep warm and this was ideal. The ability to place your arms inside or outside allows you to dial in the right temperature. It runs true to size, I'm 6' 2" 165 pounds and the regular says max height 6' 1" I do use a long sleeping bag but had no issues. The only negative I found was it fits close around the legs so its hard to side sleep and pull up one leg, if you move both it moves with you and never felt restricting. It did take a minute to wiggle my arms out and un-snap the opening. You could use it without snapping together but this was not something that should keep you from purchasing.

Rated 5.0 out of 5 stars

2 weeks ago

[This review was collected as part of a promotion.] Only used a couple of times, but so far I think this is a great liner. Warm, soft. I like the variety of sizes as well. It’s nice not to have excess fabric if you don’t require it. Arm “holes” are a really nice feature. I’ve not camped in cold enough temps yet to warrant using it inside my bag, but for what it’s worth, I’ve used it by itself in 65 ish degree (Fahrenheit) weather with a cotton blanket and was warm and comfortable. Zipper is smooth and glides easily. Cleans up nicely and dries quickly too. I’ve only washed it twice, but there is no pilling so far, so yeah. I’m not crazy about the color, but I don’t consider that a deal breaker. And if I could choose I’d add the draw cord at the foot of this liner too. It’s been is a nice substitute for a blanket in the camper and not having to crawl out to walk around would be super handy. (I think last year’s version of the reactor had that feature. I know the breeze still does). Despite those two little complaints, I’m happy with the liner and would indeed recommend it.

Rated 4.0 out of 5 stars

2 weeks ago

[This review was collected as part of a promotion.] Love the material of this liner. Silk has always felt a bit clammy to me and the material they use here has a really solid warmth to weight. It’s also soft and when using with a quilt keeps you off your sleeping pad which is nice.