Sea to Summit Midweight Liner

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.

• Thermolite® Pro uses Far Infrared technology and hollow-core fibres to trap and reflect body heat without extra bulk
• Stretch-knit and shaped arm openings allow unrestricted movement
• 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
• Machine washable construction simplifies care and reduces wear on your sleeping bag over time
• Crafted with certified recycled fibres and bluesign APPROVED materials to minimise environmental impact