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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21
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Description
Reactor Lightweight Liner Sea To SummitOptimised for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite Pro fabric, which uses infrared absorbing ceramic pigments and hollow core fibres to trap body heat. Adding up to 4C 7F of warmth with minimal bulk, its ideal for ultralight expeditions. Stretch knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odour control, its quick drying,
Optimised for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibres to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odour control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.
FEATURES
- Lightweight and insulative, Thermolite® Pro technology with hollow-core fibres and infrared-absorbing pigments enhances warmth with minimal pack size
- Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
- Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
- Fits any sleeping bag - Stretch fabirc means the Reactor Liner fits any shape of sleeping bag
- Stay Fresh Longer – HeiQ Fresh odour control technology keeps the liner fresh after extended use
- Sleep System Integration – Snap connectors at the shoulders easily pair with Sea to Summit sleeping bags for quick, hassle-free entry and exit
- Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
- Lower Impact Materials – Crafted with certified recycled fibres and bluesign APPROVED materials to minimise environmental impact
TECH SPECS
Weight
S: 235g
R: 255g
L: 260g
Certification
RCS - 1114661
Dimensions
Short: 80 x 178cm
Regular: 80 x 193cm
Long: 80 x 198cm
Ideal for
Backpacking, Cycle touring, Paddle touring
Packed dimensions
10 x 10 x 18cm
Recommended user height
S: 170cm
R: 183cm
L 198cm
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
4.7 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 4
Tasty treat but better as a quick reward than a long chew
I gave these to my German Shepherd and Lab as occasional treats. They were immediately interested and finished them quickly, which usually means they’re both appealing and easy to eat.
These aren’t long-lasting chews—they’re more of a quick snack. For larger dogs especially, they won’t keep them occupied for very long.
Compared to tougher chew options, these are better suited for training rewards or short treat sessions.
I’d rate them 4 stars. Good flavor appeal, but not designed for extended chewing.
Tip: Use them as a reward treat rather than something to keep your dog busy.
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Low fat treats
My dog loves these. Keeps begging for more. Will definitely repurchase
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Chicken and Peanut Butter - Two Great Tastes That Taste Great Together... to my Dog
My dog is a fairly selective eater, but she loves chicken jerky and peanut butter, so I thought I'd give these a try. She took to them right away, and can finish one off in about 3 minutes.
They have a distinct smell of peanut butter (despite peanut butter only being 3% of the composition). Each chicken jerky-wrapped peanut butter biscuit is about 4.5" long, and they arrive packaged in a resealable bag.
Made in China; my bag was printed with a 'BEST BEFORE' date over a year from the date I received them.
Note that these treats have been irradiated to kill harmful bacteria and parasites.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Dogs love them
This product offers a solid overall experience and delivers well on its core purpose. The design is practical and user-friendly, making it easy to get started without much effort. In terms of performance, it works reliably for everyday use and meets basic expectations.
The build quality feels decent, with materials that appear durable enough for regular use. While it may not be the most premium option available, it provides good value for its price point. Most users will find it to be a worthwhile purchase, especially if they are looking for something functional and straightforward.
There are a few minor areas where it could be improved, but they do not significantly impact the overall experience. Considering its features, usability, and affordability, this product is a good choice for anyone seeking a dependable option without overcomplicating things.
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Reviewed in the United States on March 31, 2026
★★★★★ 5
Tasty Combo That Doggo Loves
These chicken wrapped peanut butter biscuits are a big hit. My dog comes running as soon as he hears the bag open. The only downside is they can be a little messy depending on how your dog eats, but nothing too bad. Overall, they’re a great treat that most dogs will love and look forward to.
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Reviewed in the United States on April 10, 2026
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