Sea To Summit Reactor Midweight Liner - Regular/Black (053302)

Add warmth to your sleep system without unnecessary bulk. The Reactor Midweight uses advanced Thermolite® Pro fabric, combining infrared-absorbing ceramic pigments with hollow-core fibres to trap and reflect body heat. When paired with a quality sleeping bag and insulated mat, it can increase warmth by up to 6°C (11°F).

Its stretch-knit construction, ergonomic shape and arm openings provide excellent freedom of movement, while the fitted hood helps retain heat. HeiQ Fresh odour-control technology keeps the liner fresher for longer, and the machine-washable fabric reduces how often your sleeping bag needs cleaning.

Key Features

• Adds up to 6°C (11°F) of warmth when used with a suitable sleeping bag and mat

• Thermolite® Pro Far Infrared technology helps capture and retain body heat

• Lightweight, low-bulk design ideal for human-powered adventures

• Stretch-knit fabric and shaped arm openings allow unrestricted movement

• Ergonomic shape and fitted hood improve warmth and comfort

• Shoulder snap connectors integrate with compatible Sea to Summit sleeping bags

• HeiQ Fresh technology provides lasting odour control

• Quick-drying and machine washable for easy care

• Helps extend sleeping-bag life by reducing wash frequency

• Made with certified recycled fibres and bluesign® APPROVED materials

Specifications

• Best use: Backpacking, cycle touring and paddle touring

• Length: 193 cm / 76 in

• Packed weight: 365 g / 12.9 oz

• Packed size: 19 × 11.5 × 11.5 cm / 7 × 5 × 5 in

• Material: 100% post-consumer recycled polyester

• Stuff sack: 100% polyester

Warm-Weather Use

In still summer conditions, the Reactor Midweight may be used on its own by sleepers wearing long base layers. The fabric is not windproof.

The warmth increase depends on the heat retention of the sleeping bag and the insulation provided by the sleeping mat.