Product Description
The Sea to Summit Reactor Lightweight Liner is the ultimate addition to your sleep system, designed for those who seek extra warmth without the bulk. Whether you are trekking through unpredictable climates or camping under the stars, this liner provides a soft and cozy layer that transforms your sleeping experience. The advanced stretch-knit fabric ensures you can move freely throughout the night, making it feel more like your bed at home than a technical sleeping bag. Its ergonomic mummy shape with a fitted hood provides optimal coverage, while the innovative arm openings allow you to use your hands for reading or adjusting gear without losing precious heat.
Crafted for versatility, this liner acts as a hygiene barrier, keeping your main sleeping bag clean and extending its lifespan. In warmer conditions, it can even be used as a standalone shell, offering just enough protection and breathability for a comfortable night's rest. The integrated snap connectors at the shoulders allow for seamless pairing with compatible Sea to Summit bags, ensuring the liner stays perfectly in place as you move. Compact and easy to pack, it disappears into your rucksack, ready to provide that essential thermal boost whenever the temperature drops.
Technically, the Reactor Lightweight utilizes Thermolite® Pro technology. This advanced fabric features hollow-core fibers combined with infrared-absorbing ceramic pigments that reflect your body’s own heat back to you. This system can increase the warmth of your sleeping bag by up to 4°C. Additionally, the fabric is treated with HeiQ Fresh odor control, a plant-derived technology that keeps the liner smelling fresh during long expeditions.
The liner is made from 100% recycled polyester, supporting a high-performance design with responsible material choices. It is easy to care for and machine washable, drying quickly to be ready for your next journey.
Material: 100% recycled polyester Thermolite® Pro
Technology: HeiQ Fresh odor control
Shape: Mummy with fitted hood and arm openings
Dimensions: 193 x 80 cm
Weight: 255g
Packed size: 10 x 18 x 10 cm
Thermal boost: Up to 4°C
Compatibility: Fits all sleeping bags; snaps into Sea to Summit bags
