An ideal addition to your camping kit, the Reactor Lightweight Sleeping Bag Liner from Sea To Summit offers up to 6°C of additional heat inside your sleeping set up. In addition to the stretch-knit construction, this liner has armholes to increase freedom of movement, handy if you toss and turn under the stars. 

Features:

• Freedom to Move: Stretch-knit construction and armholes provide unrestricted comfort for any sleep position.
  
• Lightweight Thermal Boost: Thermolite® Pro with FIR and hollow-core fibres adds up to 4 °C | 7 °F warmth.
  
• Easy to Clean: Quick-drying and machine washable with HeiQ Fresh odour control treatment.
  
• Compatible Design: Fits all sleeping bags and snaps into Sea to Summit bags for secure positioning.
  
• Protects Your Sleeping Bag: Reduces washing frequency to maintain insulation loft and extend bag lifespan.
  
• Ideal for backpacking, travel, hut stays, and warmer-weather adventures.

Materials:

• Thermolite Pro & Thermolite EcoMade

Specifications:

• Best use: Backpacking & Camping
• Added Warmth: Up to 6°C
• Comes With: Ultra-Sil stuff sack
• Shape: Mummy
• Weight: 255g
• Max Height: 185cm