Our Ski & Ride Guide—
Select a size:
Staying warm means staying happy.
The Sea to Summit Thermolite Reactor Extreme Sleeping Bag Liner is a great way to get an extra season out of your sleeping bag or stay warm in unpredictable weather. Lightweight and highly breathable Thermolite fabric will add up to 25 degrees Fahrenheit to your bag’s temperature rating at a low cost of 399 grams added to your pack. The Reactor Extreme has a mummy shape to mesh with your sleeping bag and a draw cord hood that can be cinched up when it’s really cold.
- Sleeping bag liner adds up to 25 degrees to sleeping bags
- Thermolite insulation is light, breathable, and packable
- Included stuff sack
- Item #STS0084
4.5 based on 33 ratings
Fits SmallScreen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
What do you think about this product?
ViewSelecting an option will reload the available reviews on the page
Sorry, we don’t currently have any of those types of reviews for this product.