Thermolite Reactor Liner - Wanderer's Outpost
Thermolite Reactor Liner - Wanderer's Outpost
Thermolite Reactor Liner - Wanderer's Outpost
Thermolite Reactor Liner - Wanderer's Outpost
Thermolite Reactor Liner - Wanderer's Outpost
Thermolite Reactor Liner - Wanderer's Outpost

Thermolite Reactor Liner

Regular price $62.95
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Shipping calculated at checkout.

Only 1 items in stock!

The THERMOLITE® Reactor™ liner is our top seller in the sleeping bag liner range. It's an excellent cold weather option for those who need additional warmth. The hollow core fibers trap heat and offer extraordinary insulating properties. This is a super stretchy, soft, and comfortable choice with a mummy shape, foot box and a drawcord hood. Compact and lighter weight than fleece, this is a best seller for good reason.

  • Adds up to 14°F / 8°C of warmth to a sleeping bag
  • Lighter weight, more packable than fleece
  • Mummy shape with a box foot
  • Drawcord hood with mini cord lock
  • Packs into its own Ultra-Sil™ stuff sack
  • Dimensions: 82 in / 208 cm
  • Stuff Sack Size: 5.75 x 4 in / 15 x 11 cm
  • Weight: 8.7 oz / 248 g
  • Thermolite polyester fabric

The origins of Sea to Summit began in 1983 in Perth, Western Australia - a time when lightweight, outdoor products were hard to find in Australia. The original products were developed to outfit an audacious attempt to climb Mt Everest by beginning the ascent at sea level. This gear would need to work at every altitude over several months and be light and durable enough for the 5 month trek. The expedition was a success and so was the gear and the Sea to Summit brand was born. 

women sleeping bag lake

Toasty Warm
No Matter the weather

Sleeping gear designed just for you

Why buy a women specific Sleeping bag

Everyone is different. Women tend to feel colder especially in their extremities. That's why all of our women's sleeping bags and pads have additional insulation throughout with an extra helping in the foot box.

They are also shorter overall, wider in the waist, and narrower in the hips to help keep the warm air closer to your body. However, if this doesn't sound like you, a unisex option might be a better fit. 

tent in summer and winter

Temperature Ratings

Synthetic or Down?

down or synthetic
mummy bag

Mummy vs Side Sleeping