Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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
4.8 ★★★★★
Based on 1437 reviews
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Product Reviews
★★★★★ 5
Good shoe
Color: Black, Size: 7.5
Comfortable heels true to size they look so good with many different going out outfits. So far they have not broken in half so that’s a plus
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Love these shoes!
Color: Tan, Size: 7
Cute style, nice neutral color (exactly like the picture), and surprisingly comfortable too! Heels are wide and not too high.
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Reviewed in the United States on May 14, 2026
★★★★★ 4
Shoe fit
Color: Black, Size: 10
They are very cute and comfy. Just an impulse buy for me. I feally.had no use to wear heels.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
BUY THESE
Color: Black, Size: 8
Shocked at how comfortable these shoes are. I spend a lot of time standing and moving around as an esthetician. I wore these 8-9 hours straight at work for 2 days and it was shocked at the comfort. They are just right height and cute with long pants. Super cute, I’m so glad i took a chance on these. I bought black and tan
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Comfortable
Color: Tan, Size: 6
Very comfortable! I was able to wear these for a long period of time during the day and didn’t give me any issues. True to size. Color is great!
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Reviewed in the United States on June 4, 2026