If you require assistance with a web order or online purchase, please submit a contact form HERE
This is the best way to get in touch with our online Customer Service team.

For a limited time, get free shipping on orders over $49! Conditions apply

Now offering, Sezzle: Buy now, Pay Later. Learn MoreNow offering, Sezzle: Buy now, Pay Later. Learn More

Reactor Fleece Sleeping Bag Liner Mummy With Drawcord

In stock

This item qualifies for FREE shipping!


Please note: all sleeping bags and liners are final-sale.

The Reactor Fleece Liner built from hollow-core Thermolite® Pro fibres used in a grid-pattern to deliver our warmest sleeping bag liner and the core of any quality cold weather sleep system. You can regulate your temperature using the shoulder zippers and drawcord footbox, which also align perfectly with the Free Flow-Zip system of Sea to Summit sleeping bags. The versatile Reactor Fleece Liner delivers comfort across multiple seasons or can even be used as a stand-alone sleeping bag in warm weather. Additionally, the drawcord footbox offers plenty of ventilation and the versatility of walking around camp while still wearing your liner if needed.


  • Thermal boost to retain heat and warmth, as the core of your sleep system the Reactor liner extends the performance of your sleeping bag and sleeping mat in the coldest of conditions
  • Hollow-core Thermolite® EcoMade fibres are used in a grid-pattern fleece for maximum warmth retention
  • Drawcord footbox can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
  • HeiQ Fresh odour control technology helps keep the liner fresh even after extended use
  • A mummy shape designed for maximum thermal efficiency and includes shoulder zippers and footbox drawcord for additional temperature regulation


  • WEIGHT: 14.8oz | 420g
  • DIMENSIONS: 85 x 31.5 in | 216 x 80 cm
  • PACKED SIZE: 9.8 x 3.5 x 5.5in | 25 x 9 x 14cm
  • BEST USE: Thermal Boost
  • COMES WITH: Storage Case
  • MATERIAL(S): Thermolite® EcoMade Polyester
  • SPECIAL: Bio-based HeiQ Fresh Odor Control
More Information
brand Sea to Summit
Summit Days: 20% off with code SUMMIT20 No
New No
Price $139.95
Write Your Own Review
You're reviewing:Reactor Fleece Sleeping Bag Liner Mummy With Drawcord
Your Rating