The Sea to Summit Reactor Lightweight Sleeping Bag Liner is designed to boost warmth, comfort, and versatility for ultralight camping, backpacking, and expedition sleep systems. Built with advanced Thermolite® Pro fabric featuring infrared-absorbing ceramic pigments and hollow-core fibers, this lightweight liner helps trap body heat efficiently while adding up to 4°C / 7°F of additional warmth with minimal added bulk.
Its stretch-knit construction and articulated arm openings provide enhanced mobility and comfort, allowing for unrestricted movement throughout the night. Treated with HeiQ Fresh odor control technology, the liner stays fresher longer, dries quickly, and is machine washable for easy maintenance. In addition to improving warmth, it also helps extend the lifespan of your sleeping bag by reducing the need for frequent washing. Lightweight, packable, and performance-focused, the Reactor Lightweight is an excellent addition to fast-and-light sleep systems.
Features:
Lightweight and insulative, Thermolite® Pro technology with hollow-core fibers 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 fabric means the Reactor Liner fits any shape of sleeping bag
Stay Fresh Longer – HeiQ Fresh odor 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 fibers and bluesign APPROVED materials to minimize environmental impact
