Best in 7 days
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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Sea to Summit Reactor Sleeping Bag LinerThe THERMOLITE Reactor Extreme liner is Sea to Summits warmest knitted sleeping bag liner. If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. Plus in warmer weather, it can be used as a stand alone sleeping bag. The hollow core fibres of the THERMOLITE fabric work like a polar bear's fur and, along with the knitted structure, trap plenty of insulating air. Super soft and amazingly stretchy,
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.0 ★★★★★
Based on 391 reviews
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Product Reviews
★★★★★ 5
Buy..good item
Size: XX-Large, Color: Black, White, Blue
These I liked. T-shirt material but with the mock turtle neck collar. Light and airy. Going to buy more.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Fits great wear good 😊
Size: Large, Color: Black, White, Apricot
Good shirts
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Reviewed in the United States on February 13, 2026
★★★★★ 5
NICE FABRIC, good sizing
Size: X-Large, Color: Black, White, Blue
These shirts are nice and long, which I appreciate being over 6' tall. I am always reluctant to buy any shirts that are not tall size, but these are long enough to solve that problem. The fabric is soft and comfortable... a good price for good shirts.
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Reviewed in the United States on September 13, 2024
★★★★★ 4
Comfortable
Size: Large, Color: Light Blue, White, Black
Nice and soft material , not like a t-shirt.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Really great shirt. Fits great
Size: Large, Color: Black, White, Brown
Just wore one of mine and I really love it!
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Reviewed in the United States on January 16, 2026
