Sea to Summit Reactor Fleeceweight Liner

Sea to Summit Reactor Fleeceweight Liner is a lightweight, heat-boosting sleeping bag liner designed to noticeably increase warmth with minimal bulk. This liner uses a fleece-like knit with hollow-core fibers to help retain body heat while still allowing comfortable movement through the night.

Shaped arm openings and a fitted hood improve comfort and coverage, and snap attachments integrate neatly with compatible Sea to Summit sleeping bags. Quick-drying and easy to wash, it also helps reduce how often the sleeping bag itself needs cleaning, supporting long-term loft.

• Adds significant extra warmth to a sleep system while keeping pack weight low
• Hollow-core Thermolite fibers paired with grid fleece help hold and reflect body heat
• Stretch-knit construction and shaped arm openings allow natural movement in the bag
• Ergonomic shape with a close-fitting hood increases coverage without extra bulk
• Snap attachments connect to Sea to Summit sleeping bags for simpler entry and access
• Fast to clean and dries quickly for easier upkeep on trips
• HeiQ Fresh odor control helps keep the liner feeling fresher between washes
• Using a liner can reduce sleeping bag wash frequency to help preserve loft over time

Dimensions
Short: 178 cm
Regular: 193 cm
Long: 206 cm