Short || Reactor Lightweight Liner
Short
Short || Reactor Lightweight Liner
Short
Reactor Lightweight Sleeping Bag Liner Reactor Lightweight Sleeping Bag Liner Reactor Lightweight Sleeping Bag Liner Reactor Lightweight Sleeping Bag Liner
New
Short || Reactor Lightweight Liner
Short
Short || Reactor Lightweight Liner
Short
Reactor Lightweight Sleeping Bag Liner Reactor Lightweight Sleeping Bag Liner Reactor Lightweight Sleeping Bag Liner Reactor Lightweight Sleeping Bag Liner
New

Reactor Lightweight Sleeping Bag Liner

$89.99
  • Size

View Tech Specs

in stock Free express shipping over $99*

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Highlights

Best Use: Backpacking, Cycle touring, Paddle touring

Type: Thermal Liner

Weight: 8.3oz | 235g

Length: 70.1in | 178cm

Packed Size: 3.9 x 7.1 x 3.9in | 18 x 10 x 10 cm

Performance
Weight
  • Ultralight
  • Lightweight
  • Midweight
Packability
  • Ultra Compact
  • Compact
  • Midsize
Climate
  • Warm
  • Cold
  • Extreme Cold
About The Product

Optimised for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibres to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odour control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.

Features

  • Lightweight and insulative, Thermolite® Pro technology with hollow-core fibres and infrared-absorbing pigments enhances warmth with minimal pack size
  • Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
  • Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
  • Fits any sleeping bag - Stretch fabirc means the Reactor Liner fits any shape of sleeping bag
  • 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
  • Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
  • Lower Impact Materials – Crafted with certified recycled fibres and bluesign APPROVED materials to minimise environmental impact
Product Features

Learn more

Shipping & Returns

Free Express shipping via Australia Post within Australia for orders over $99.*

All orders under $99 incur a $10.00 shipping fee for delivery within Australia.

*Does not include bulky items. Orders with bulky items incur an additional freight charge within Australia during the checkout process.

For more details, check out our Shipping Policy.

We do not ship to an address outside of Australia.

If you are not entirely satisfied with your order, you may be entitled to a refund of the purchase price of the Product. For more details, please check out our Refund Policy.

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Short || Reactor Lightweight Liner

Reactor Lightweight Sleeping Bag Liner Short

Short || Reactor Lightweight Liner

Reactor Lightweight Sleeping Bag Liner Short

Reactor Lightweight Liner

Optimised for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibres to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odour control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.

Features

  • Lightweight and insulative, Thermolite® Pro technology with hollow-core fibres and infrared-absorbing pigments enhances warmth with minimal pack size
  • Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
  • Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
  • Fits any sleeping bag - Stretch fabirc means the Reactor Liner fits any shape of sleeping bag
  • 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
  • Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
  • Lower Impact Materials – Crafted with certified recycled fibres and bluesign APPROVED materials to minimise environmental impact

Technical Features

HEIQ Fresh
Thermolite Pro
Thermolite Eco Made

Tech specs

  • Best Use
    Backpacking, Cycle touring, Paddle touring
  • Material(s)
    100% Post-Consumer Recycled Polyester; Stuff Sack: 100% Polyester
Short Regular Long
Short
Regular
Long
Weight8.3 oz 235g9.0 oz 255g9.5 oz 270g
Dimensions70.1 x 31.5 in 178 x 80 cm76.0 x 31.5 in 193 x 80 cm81.1 x 31.5 in 206 x 80 cm
Packed Size3.9 x 7.1 x 3.9 in 10 x 18 x 10 cm3.9 x 7.1 x 3.9 in 10 x 18 x 10 cm3.9 x 7.1 x 3.9 in 10 x 18 x 10 cm
Fits Up To Height5 ft 6 in 170 cm6 ft 185 cm6 ft 6 in 198 cm

Frequently Asked questions

How much warmth does a Reactor Lightweight add to a sleeping bag?

The added warmth depends on how well the sleeping bag retains heat and how well the sleeping pad insulates. When paired with a quality bag and mat, a Reactor Lightweight can add up to 4 °C / 7 °F.

Which Reactor is the warmest?

The Reactor Fleeceweight is the warmest option, followed by the Reactor Midweight, and then the Reactor Lightweight.

Can a Reactor be machine washed and dried?

Reactor liners can be machine washed without special soaps. Do not use fabric softeners. Air dry or machine dry on a cool to warm cycle without dryer sheets.

Can a Reactor Lightweight work as a stand-alone sleeping bag?

In summer temperatures and still air conditions, a Reactor Lightweight can function on its own for sleepers wearing long base layers. The fabric is not windproof.

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