Sea to Summit

Sea To Summit Reactor Thermolite Mummy Sleeping Bag Liner

Regular price £37.99
1 in stock
Experience a blissful sleep by adding extra warmth to your sleeping bag with the Thermolite® Reactor! Featuring 80g/m² Thermolite® fabric, this unbeatable sleeping bag liner increases the performance of your sleeping bag by up to 8°C. As our bestselling liner, the Reactor also makes a great warm weather bag on its own. It's made of Thermolite®—the lightest weight available—a hollow core fibre that keeps you cozy and well-ventilated. Upgrade your sleep with the Reactor!

  • Lighter weight, more packable than fleece
  • Mummy shape with a box foot
  • Drawcord hood with mini cord lock
  • Contrasting colour along the top edge makes it easier to find the opening
  • Packs into its own Ultra-Sil® stuff sack
  • Length/Width: 210 x 90 cm
  • Weight: 248 g

Please Note: We are unable to accept returns of sleeping bag liners for obvious hygiene reasons unless faulty.
All details are in the listing, so please do NOT buy these if you are unsure of suitability.

      Customer Reviews

      Based on 13 reviews
      Mark Knight
      Fast delivery

      Excellent service received. Item as expected. Although the manufacturer claim of it adding 8 degrees is a bit of wishful thinking. Luckily didn't buy it for that reason, its a well made product and comfortable in use. Would buy again and would definitely use Freshairjunkie in the future.


      Nice and warm

      Cannot review as after 7 days I’m still waiting for item!

      “We sent your order for Sea To Summit Reactor Thermolite Mummy Sleeping Bag Liner from our team at Fresh Air Junkie 7 days ago, and would love to get your feedback” Couldn’t comment on this product as I’m still waiting to receive this item! Royal Mail 48?? What I can review is the terrible delivery service! 0 stars

      P. Olly
      Sea to Summit liner

      Great service and awesome sleeping bag liner! So comfy …. generous size.

      rebecca Zerk
      Worth the buy!

      This made a BIG difference to the warmth in my sleeping bag. Super light, cozy and easy to pack. It's worth the purchase. Customer service and delivery time was fantastic.