Keep warm when the temperatures drop outside with the Thermolite Reactor Compact Plus Liner. 

You can either place this liner inside your sleeping bag for extra warmth or use it as a stand-alone bag in warmer weather conditions. It's made of ultra-lightweight Thermolite fibre, which provides extraordinary warmth for its weight yet remains extremely breathable. 

This liner will add up to 11°C of warmth to your sleeping bag, has a mummy shape with box foot, a thin drawcord with a tiny cord lock around the hood, and packs up into its own included stuff sack for storage. 

For extra compact warmth for your sleeping set up, you can rely on the Thermolite Reactor Compact Plus Liner from Sea to Summit. 

• Ideal for users around 170cm tall or less
• Mummy shape with a box foot
• Provides extraordinary warmth weight yet remains breathable
• Adds up to 11°C of warmth to a sleeping bag
• Can be used on its own as the ideal warm-weather bag
• Thin drawcord with tiny cord-lock around the hood
• Ideal for lightweight backpackers under 6 ft tall
• Packs into its own Cordura stuff sack