Camp cosy with the Sea To Summit Reactor Extreme Sleeping Bag Liner featuring a standard mummy shape. This versatile and high-performance thermal layer transforms your existing sleep system into a cold weather ready setup. 

Advanced Thermolite Pro fabric ensures this sleeping bag liner uses an adventure-worthy formula of knitted hollow-core fibres that capture air for toasty warmth, and infra red-absorbing ceramic pigments to boost thermal effectiveness. It ensures that your own body heat works in your favour on chilly nights, reflecting it back to you.

Stay cocooned in comfort with the mummy shape and stretch-knit fabric for an unrestricted night’s sleep. The moisture-wicking fibres make it ready for when the temperature rises, while offering a soft layer to protect your sleeping bag. The bio-based HeiQ Fresh odour control technology ensures you stay in a comfortable, healthy sleep environment.

The snap closure at the shoulders and the adjustable drawcord footbox deliver customisable ventilation. They complement the Free-Flow Zip system of select Sea To Summit sleeping bags, making it easy to complete your sleep system. Whether used in mildly cold conditions or combined with your winter sleeping bag for serious chills, this sleeping bag liner offers worry-free adaptability. 

Key Features:

• Cold Weather Versatility: Ideal as a thermal boost on cold nights and doubles up as a soft layer of protection to keep your sleeping bag clean in milder climates. 
• Mummy Shape: Accommodates campers up to 198cm in height, providing freedom of movement without the bulk. 
• Thermolite Pro Fabric: Captures insulating air using hollow-core fibres while maintaining a soft, stretchy feel.
• Infra Red-Absorbing Ceramic Pigments: Provide a genuine thermal boost by reflecting back your body warmth.
• Thermolite EcoMade Fibres: Crafted from 100% recycled materials derived from textile waste - providing lightweight, cosy comfort and warmth while reducing environmental impacts.
• Sweat-wicking Stretch-knit Fabric: Built to manage moisture and allow you to sleep with total freedom. 
• Snap Closure At Shoulders: Shoulder opening gives you flexibility to cool down or warm up as needed.
• Drawcord Footbox: Allows adjustment of the foot area for ventilation or ease of movement around camp while wearing your liner.
• Compatible With Sleeping Bags Of All Shapes: The sleeping bag liner’s shape and stretch fabric makes it versatile to pair with your current sleep system. The shoulder and drawcord footbox openings work in harmony with the Free-Flow Zip system in select Sea To Summit sleeping bags. 
• HeiQ Fresh Odour Control Technology: Built-in odour management for fresh-feeling sleeping conditions even during multi-day camping adventures. 
• Easy To Wash: Can be machine washed to enjoy more time in the great outdoors. Avoid fabric softeners as they can reduce the effectiveness of the wicking properties.
• Includes Storage Case: For easy portability.