Sea To Summit Reactor Lightweight Sleeping Bag Liner

Engineered for performance and comfort, this thermal sleeping bag liner boosts warmth without adding bulk, making it an essential addition to any sleep system. Featuring advanced Thermolite® Pro technology, it uses hollow-core fibres and infrared-absorbing pigments to maximise heat retention while remaining lightweight and compact. The stretch-knit fabric and ergonomic design allow natural movement throughout the night, while the fitted hood provides additional warmth where it matters most. Built for convenience, it integrates easily with compatible sleeping bags and is simple to clean, helping extend the life of your gear. With odour-control technology and lower-impact materials, it’s a practical and responsible choice for outdoor adventures.

Features:

• Thermolite® Pro technology for lightweight warmth and compact packability
• Stretch-knit fabric and shaped arm openings for unrestricted movement
• Ergonomic shape with fitted hood for enhanced comfort and heat retention
• Flexible fit adapts to any sleeping bag shape
• HeiQ Fresh odour control technology for longer-lasting freshness
• Snap connectors for easy integration with compatible sleeping bags
• Machine washable for simple care and maintenance
• Made with recycled fibres and bluesign APPROVED materials for reduced environmental impact