Skip to top navigation
Skip to my shopping bag
Skip to main content
Skip to footer links
Sea to Summit Reactor Midweight Sleeping Bag Liner - Regular
Colour
Size
Size
OS




The Reactor Midweight enhances your sleep system with advanced Thermolite® Pro fabric. Infrared-absorbing ceramic pigments and hollow-core fibres trap body heat, adding up to 6°C|11°F to a sleep system with minimal bulk. Stretch-knit fabric and arm openings allow unrestricted sleep, making it a great fit for any shape sleeping bag. Quick-drying and easy to clean, it features HeiQ Fresh odour control and helps extend your sleeping bag’s lifespan by reducing wash frequency.
Features
• Best Use: Backpacking, Cycle touring, Paddle touring
• Boosts Sleep System Warmth: Thermolite® Pro uses Far Infrared technology and hollow-core fibres to trap and reflect body heat without extra bulk
• 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
• Stay Fresh Longer: HeiQ Fresh odour 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 fibres and bluesign® APPROVED materials to minimise environmental impact
Materials
• 100% Post-Consumer Recycled Polyester
• Stuff Sack: 100% Polyester
Specifications
• Type: Thermal Liner
• Length: 76in/193cm
• Dimensions: 76x31.5in/193x80cm
• Packed Size: 4.5x7.5x4.5in/19x11.5x11.5cm
• Fits Up To Height: 6ft/185cm
• Weight: 350g/12.3oz
Features
• Best Use: Backpacking, Cycle touring, Paddle touring
• Boosts Sleep System Warmth: Thermolite® Pro uses Far Infrared technology and hollow-core fibres to trap and reflect body heat without extra bulk
• 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
• Stay Fresh Longer: HeiQ Fresh odour 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 fibres and bluesign® APPROVED materials to minimise environmental impact
Materials
• 100% Post-Consumer Recycled Polyester
• Stuff Sack: 100% Polyester
Specifications
• Type: Thermal Liner
• Length: 76in/193cm
• Dimensions: 76x31.5in/193x80cm
• Packed Size: 4.5x7.5x4.5in/19x11.5x11.5cm
• Fits Up To Height: 6ft/185cm
• Weight: 350g/12.3oz
The Reactor Midweight enhances your sleep system with advanced Thermolite® Pro fabric. Infrared-absorbing ceramic pigments and hollow-core fibres trap body heat, adding up to 6°C|11°F to a sleep system with minimal bulk. Stretch-knit fabric and arm openings allow unrestricted sleep, making it a great fit for any shape sleeping bag. Quick-drying and easy to clean, it features HeiQ Fresh odour control and helps extend your sleeping bag’s lifespan by reducing wash frequency.
Features
• Best Use: Backpacking, Cycle touring, Paddle touring
• Boosts Sleep System Warmth: Thermolite® Pro uses Far Infrared technology and hollow-core fibres to trap and reflect body heat without extra bulk
• 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
• Stay Fresh Longer: HeiQ Fresh odour 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 fibres and bluesign® APPROVED materials to minimise environmental impact
Materials
• 100% Post-Consumer Recycled Polyester
• Stuff Sack: 100% Polyester
Specifications
• Type: Thermal Liner
• Length: 76in/193cm
• Dimensions: 76x31.5in/193x80cm
• Packed Size: 4.5x7.5x4.5in/19x11.5x11.5cm
• Fits Up To Height: 6ft/185cm
• Weight: 350g/12.3oz
Features
• Best Use: Backpacking, Cycle touring, Paddle touring
• Boosts Sleep System Warmth: Thermolite® Pro uses Far Infrared technology and hollow-core fibres to trap and reflect body heat without extra bulk
• 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
• Stay Fresh Longer: HeiQ Fresh odour 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 fibres and bluesign® APPROVED materials to minimise environmental impact
Materials
• 100% Post-Consumer Recycled Polyester
• Stuff Sack: 100% Polyester
Specifications
• Type: Thermal Liner
• Length: 76in/193cm
• Dimensions: 76x31.5in/193x80cm
• Packed Size: 4.5x7.5x4.5in/19x11.5x11.5cm
• Fits Up To Height: 6ft/185cm
• Weight: 350g/12.3oz