Reactor Lightweight Sleeping Bag Liner

Boost your sleep system’s warmth without adding unnecessary weight with the Sea to Summit Reactor Lightweight Sleeping Bag Liner. Purpose-built for ultralight adventures, this liner features advanced Thermolite® Pro fabric engineered with infrared-absorbing ceramic pigments and hollow-core fibres to efficiently trap body heat.

Delivering up to 4°C (7°F) of additional warmth, the Reactor Lightweight is ideal for extending the performance of your sleeping bag in cooler conditions while maintaining exceptional packability. The stretch-knit construction conforms comfortably to your body, while articulated arm openings provide freedom of movement for a more natural sleeping experience.

Designed for long trips and repeated use, the liner incorporates HeiQ Fresh odour control technology to stay fresher for longer. It is also quick-drying and machine washable, making it easy to maintain on the go. By reducing direct contact with your sleeping bag, it helps extend its lifespan and preserve insulation performance over time.

FEATURES:

• Lightweight and insulative, Thermolite® Pro technology with hollow-core fibres and infrared-absorbing pigments enhances warmth with minimal pack size
• Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
• Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
• Fits any sleeping bag - Stretch fabirc means the Reactor Liner fits any shape of sleeping bag
• Stay Fresh Longer – HeiQ Fresh odour control technology keeps the liner fresh after extended use
• Sleep System Integration – Snap connectors at the shoulders easily pair with Sea to Summit sleeping bags for quick, hassle-free entry and exit
• Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
• Lower Impact Materials – Crafted with certified recycled fibres and bluesign APPROVED materials to minimise environmental impact

SPECIFICATIONS: