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Sea to Summit

Thermolite Reactor Fleece Liner

Free delivery to most of Australia!
Same day dispatch
Easy 60 day returns

Looking to up the warmth of your sleeping bag? Or maybe you're looking for an ultralight summer sleeping bag? The Sea to Summit Reactor Fleece Liner will happily take care of both. 

This technical mummy shape sleeping bag liner is made from Thermolite® fleece which provides a brilliant balance between warmth and weight. A draw string hood allows you to trap in extra warmth, especially on those chilly nights. True to its versatility as a standalone warm weather sleeping bag, it has a quarter zip so its easy to climb in and out. 

Packing small in its own Ultra-Sil® stuff sac, the Reactor Fleece Liner is a must for the cold-sleeping mountaineer or the ultralight cyclist or trekker not wanting to carry a conventional sleeping bag. 

  • Made from light and warm Thermolite fabric
  • Quarter zip with zip guard
  • One-handed draw string hood
  • Can be used as a warm weather sleeping bag
  • Comes with Ultra-Sil® stuff sac
Snowys Code:
Supplier Code:
Max. User Height:
200 cm
Internal Girth:
140 cm
External Dimensions:
200L x 70W cm
Packed Dimensions:
21L x 15W x 15H cm
0.420 Kg
Suggested Use:
Limited Lifetime

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Warmest option1 answer

Hi Snowys, Could you please tell me the difference between the Sea to Summit Thermolite Reactor Fleece Liner and the Thermolite Reactor Extreme Liner - is one warmer than the other? Many thanks :)

- Sydney(1 month ago)

G'day Sophie,

The Sea to Summit Thermolite Reactor Fleece Liner is designed for camping and doesn't have an official temperature rating. It's also made from a fleece material making it a thicker fabric than many other liners. The Sea to Summit Thermolite Reactor Extreme is designed for Hiking and Trekking and has a temperature rating that adds an additional 15C to your sleeping bag. This is made from a thinner fabric to keep weight down.

- Snowys(1 month ago)

Delivery to

Pick up from Snowys

92 Richmond Rd, Keswick SA

Opening hours:
Mon - Fri: 9am - 5.30pm
Saturday: 9am - 5pm
Sunday: 12pm - 5pm
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