Sea to Summit Reactor Lightweight Sleeping Bag Liner, Regular

Transform your ultralight sleep system with the Sea to Summit Reactor Lightweight Sleeping Bag Liner, the game-changing thermal liner that adds up to 4°C of warmth without the weight penalty that kills your backpacking groove. Built with innovative Thermolite Pro fabric featuring infrared-absorbing ceramic pigments and hollow-core fibers, this sleeping bag liner actively captures and holds your body heat while weighing just 255g in regular size. The stretch-knit construction moves with you throughout the night thanks to articulated arm openings, ensuring you wake up refreshed rather than twisted like a pretzel, while the fitted hood design maximizes thermal efficiency where you need it most. Whether you're cycle touring through the Rockies, paddle touring northern lakes, or pushing into ultralight backpacking territory, this liner extends your existing sleep system's temperature range and protects your investment by reducing how often you need to wash your sleeping bag. Machine washable with HeiQ Fresh odor control, it's the lightweight sleeping liner that proves you don't have to choose between comfort and carrying less.

Features

• Thermolite® Pro fabric with infrared-absorbing ceramic pigments and hollow-core fibers for advanced heat retention
• Stretch-knit construction with articulated arm openings for unrestricted mobility during sleep
• HeiQ Fresh odor control technology for extended freshness on multi-day adventures
• Snap connectors at shoulders for seamless integration with Sea to Summit sleeping bags
• Ergonomic hood design for optimal warmth distribution
• Quick-drying and machine washable for easy maintenance
• Universal fit design accommodates any sleeping bag shape
• 100% Post-Consumer Recycled Polyester construction with bluesign APPROVED materials