Reactor Midweight Sleeping Bag Liner Regular

About the Sea to Summit Reactor Midweight Liner - Regular

What is the Sea to Summit Reactor Midweight Sleeping Bag Liner Regular good for?

This liner is designed for extending sleeping bag temperature ratings across three-season camping and backcountry expeditions. It's built for users who need additional thermal performance without carrying extra gear weight. The Reactor Midweight works well in alpine environments, shoulder-season camping, and extended wilderness trips where washing opportunities are limited. This liner handles temperature variations in transitional weather whilst maintaining performance from early autumn through late spring conditions.

The stretch-knit construction provides complete freedom of movement whilst fitting inside any sleeping bag design. Thermolite Pro insulation uses Far Infrared Technology and hollow-core fibres to trap and reflect body heat, adding up to 6°C of warmth to your sleep system. The liner also features arm openings with snap closures that increase practicality for in-bag movement. Furthermore, the HeiQ Fresh odour control treatment keeps the liner fresh throughout extended use whilst reducing washing frequency.

Sea to Summit applies technical outdoor expertise to create practical sleep system solutions. This liner reduces the need for frequent sleeping bag washing, helping maintain loft and extend usable life. The integration of recycled materials maintains environmental responsibility without compromising thermal performance. The quick-drying properties and easy cleaning ensure the liner handles real-world expedition conditions.