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 fibres 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

Packed Size Comparison

Similar to a small foam football

Weight

248g ≈ Two sticks of butter

Warmth

Adds up to 8°C to the temperature range of your sleeping bag
Other options available .

BONUS

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

ADDED WARMTH: Up to 14°F / 8°C
BEST USE: Backpacking, Camping
COMES WITH: Ultra-Sil stuff sack
MATERIAL(S): Thermolite polyester fabric
SHAPE: Mummy