Sea To Summit Reactor - Thermolite Liner

Availability: 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.

Packed Size Comparison
Similar to a small foam football

8.7 oz ≈ Two sticks of butter

Adds up to 14°F to the temperature range of your sleeping bag

Easy to wash and helps to keep your down bag cleaner for longer

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

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