Sea to Summit Reactor Lightweight Sleeping Bag Liner
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Product Description
LIGHTWEIGHT INSULATING SLEEPING BAG LINER WITH THERMOLITE® PRO TECHNOLOGY, STRETCH KNIT COMFORT, HEIQ FRESH ODOUR CONTROL AND SLEEP SYSTEM INTEGRATION
The Sea to Summit Reactor Lightweight Sleeping Bag Liner is designed to improve sleep system warmth without adding unnecessary weight or bulk. Built for backpacking, cycle touring, paddle touring and lightweight travel, it adds comfort, warmth and hygiene to your sleeping setup.
Thermolite® Pro technology uses hollow-core fibres and infrared-absorbing ceramic pigments to help trap body heat and improve warmth with a minimal packed size. When paired with a quality sleeping bag and mat, the Reactor Lightweight can add up to 4°C of warmth.
The stretch-knit fabric and shaped arm openings allow natural movement through the night, so you can sleep comfortably without feeling restricted. A technical shape and fitted hood help improve warmth around the head and upper body without adding extra weight or bulk.
HeiQ Fresh odour control helps keep the liner fresh after extended use, while the machine-washable construction makes it easy to clean between trips. It also helps protect your sleeping bag from body oils and dirt, reducing wash frequency and helping preserve loft and lifespan.
Available in Short, Regular and Long models, the Reactor Lightweight Liner is a compact, low-weight upgrade for extending comfort across cooler nights, changing conditions and lightweight adventures.
LIGHTWEIGHT SLEEP SYSTEM WARMTH
- Designed to enhance sleeping bag performance with minimal weight
- Can add up to 4°C of warmth when paired with a quality sleeping bag and mat
- Ideal for lightweight camping, backpacking, cycle touring and paddle touring
- Compact packed size makes it easy to carry on extended trips
THERMOLITE® PRO TECHNOLOGY
- Hollow-core fibres help trap body heat
- Infrared-absorbing ceramic pigments help improve thermal performance
- Designed for warmth without bulky insulation
- Balances warmth, low weight and packability
FREEDOM TO MOVE
- Stretch-knit fabric fits any sleeping bag shape
- Shaped arm openings allow unrestricted movement
- Supports a more natural sleeping position through the night
- Reduces restriction compared with non-stretch liners
TECHNICAL SHAPE AND HOOD
- Ergonomic design improves comfort and warmth
- Fitted hood helps retain warmth around the head
- Technical cut reduces excess fabric and unnecessary bulk
- Designed to work cleanly inside mummy-style sleeping bags
SLEEP SYSTEM INTEGRATION
- Snap connectors at the shoulders pair with Sea to Summit sleeping bags
- Quick-release front entry makes access easier
- Designed to stay aligned inside compatible Sea to Summit sleeping bags
- Works as part of a layered sleep system for changing conditions
EASY CARE AND LONGER BAG LIFE
- HeiQ Fresh odour control helps keep the liner fresher after extended use
- Machine washable construction simplifies care
- Helps reduce wear and washing on your sleeping bag over time
- Helps preserve sleeping bag loft and extend sleeping bag lifespan
FABRIC COMPOSITION
- 100% post-consumer recycled polyester
- Stuff sack: 100% polyester
- Stretch-knit construction for movement and comfort
- Thermolite® Pro fabric technology
TECHNOLOGY
- Thermolite® Pro hollow-core fibres help trap body heat
- Infrared-absorbing ceramic pigments help improve warmth
- HeiQ Fresh odour control helps keep the liner fresher for longer
- Snap connectors support Sea to Summit sleep system integration
SUSTAINABILITY DETAILS
- Crafted with certified recycled fibres
- bluesign® approved materials
- Helps reduce sleeping bag washing frequency
- Helps preserve sleeping bag loft and extend sleeping bag lifespan
CARE
- Machine washable
- Do not use fabric softener
- Air dry or machine dry on a cool to warm cycle without dryer sheets
- Dry fully before storing
- Store clean and dry between trips
| Specification | Details |
|---|---|
| Product Type | Lightweight insulating sleeping bag liner |
| Available Models | Short, Regular and Long |
| Best Use | Backpacking, cycle touring and paddle touring |
| Material | 100% post-consumer recycled polyester |
| Stuff Sack Material | 100% polyester |
| Thermal Technology | Thermolite® Pro |
| Added Warmth | Up to 4°C when paired with a quality sleeping bag and mat |
| Odour Control | HeiQ Fresh |
| Construction | Stretch-knit fabric |
| Shape | Technical mummy-style shape with fitted hood |
| Arm Openings | Shaped openings for unrestricted movement |
| Sleep System Integration | Shoulder snap connectors pair with Sea to Summit sleeping bags |
| Entry | Quick-release front entry |
| Packability | Compact |
| Care | Machine washable |
| Best Use Conditions | Cool nights, lightweight camping, backpacking, travel and sleeping bag hygiene |
The Sea to Summit Reactor Lightweight Sleeping Bag Liner is available in Short, Regular and Long models. Choose the model that best matches your height and sleeping bag length.
| Model | Weight | Dimensions | Packed Size | Recommended User Height |
|---|---|---|---|---|
| Short | 235 g | 178 x 80 cm | 18 x 10 x 10 cm | Up to 170 cm |
| Regular | 255 g | 193 x 80 cm | 18 x 10 x 10 cm | Up to 185 cm |
| Long | 270 g | 206 x 80 cm | 18 x 10 x 10 cm | Up to 198 cm |
How much warmth does the Reactor Lightweight add to a sleeping bag?
The added warmth depends on your sleeping bag and mat setup, but the Reactor Lightweight can add up to 4°C when paired with a quality sleeping bag and mat.
What is the Sea to Summit Reactor Lightweight Sleeping Bag Liner best used for?
It is best used for backpacking, cycle touring, paddle touring, cool-weather camping, travel and improving sleeping bag hygiene.
What sizes are available?
This liner is available in Short, Regular and Long models.
What is the Reactor Lightweight made from?
It is made from 100% post-consumer recycled polyester, with a 100% polyester stuff sack.
Can the Reactor Lightweight work as a stand-alone sleeping bag?
In warm summer conditions and still air, it can function on its own for sleepers wearing long base layers. The fabric is not windproof.
Can the Reactor Lightweight be machine washed and dried?
Yes. Reactor liners can be machine washed without special soaps. Do not use fabric softener. Air dry or machine dry on a cool to warm cycle without dryer sheets.
Which Reactor size should I choose?
Choose Short for users up to 170 cm, Regular for users up to 185 cm and Long for users up to 198 cm.
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