




We offer free standard shipping to every province and territory in Canada.
We offer free standard shipping to every province and territory in Canada. No minimum purchase is required, and all orders include tracking for your convenience.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Deliveries to Canada’s outer and remote regions may experience seasonal delays caused by severe weather or limited carrier availability. We appreciate your patience and recommend allowing additional time for your order to arrive safely.
Meet the Sea to Summit Reactor Sleeping Bag Liner, Extreme Compact. This lightweight, mummy‑shaped liner slips inside most sleeping bags to add warmth and maintain personal hygiene without adding bulk. Its compact form is ready for minimalist packs, yet it delivers a noticeable layer of comfort under variable outdoor conditions.
The liner features Thermolite Pro technology, which uses knitted hollow‑core fibers and infrared ceramic pigments to reflect your body heat back to you. The result is a warmer feel and a softer touch as you settle into your sleeping bag for the night.
A drawcord footbox lets you open or close for tailored comfort, and the liner integrates smoothly with the footbox design used in Sea to Summit Free-Flow Zip compatible bags. HeiQ Fresh odor control helps keep the liner feeling fresh after extended use.
Knitted fabric provides notable stretch and freedom of movement in a mummy-shaped liner, working with sleeping bags of various shapes. The product is backed by Sea to Summit’s lifetime guarantee, reflecting durability and support throughout its lifespan.
Q: What is the Sea to Summit Reactor Sleeping Bag Liner Extreme Compact used for?
A: This ultra-compact liner adds warmth, enhances hygiene, and reduces odor buildup without adding significant bulk.
Q: Is the Reactor liner compatible with Sea to Summit's Free-Flow Zip system or other sleeping bags?
A: Yes—it's designed to work with many sleeping bags and footbox configurations, with adjustable footbox for comfort.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Thanks for subscribing!
This email has been registered!
| Product | SKU | Description | Collection | Availability | Product type | Other details |
|---|