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Reactor Midweight Sleeping Bag Liner

$103.98

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Long

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Highlights

Best Use: Backpacking, Cycle touring, Paddle touring

Type: Thermal Liner

Weight: 11.6oz | 330g

Length: 70.1in | 178cm

Packed Size: 4.5 x 7.5 x 4.5 in | 19 x 11.5 x 11.5 cm

Performance

Weight

Ultralight
Lightweight
Midweight

Packability

Ultra Compact
Compact
Midsize

Climate

Warm
Cold
Extreme Cold

About The Product

The Reactor Midweight enhances your sleep system with advanced Thermolite® Pro fabric. Infrared-absorbing ceramic pigments and hollow-core fibers trap body heat, adding up to 6°C|11°F to a sleep system with minimal bulk. Stretch-knit fabric and arm openings allow unrestricted sleep, making it a great fit for any shape sleeping bag. Quick-drying and easy to clean, it features HeiQ Fresh odor control and helps extend your sleeping bag’s lifespan by reducing wash frequency.

Features

Boosts Sleep System Warmth – Thermolite® Pro uses Far Infrared technology and hollow-core fibers to trap and reflect body heat without extra bulk
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
Stay Fresh Longer – HeiQ Fresh odor 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 fibers and bluesign APPROVED materials to minimize environmental impact

Product Features

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Reactor Midweight Sleeping Bag Liner Short

Features

Boosts Sleep System Warmth – Thermolite® Pro uses Far Infrared technology and hollow-core fibers to trap and reflect body heat without extra bulk
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
Stay Fresh Longer – HeiQ Fresh odor 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 fibers and bluesign APPROVED materials to minimize environmental impact

Technical Features

HEIQ Fresh

Thermolite Eco Made

Thermolite Pro

Tech specs

Best Use

Backpacking, Cycle touring, Paddle touring
Material(s)

100% Post-Consumer Recycled Polyester; Stuff Sack: 100% Polyester

	Short	Regular	Long
Weight	11.6 oz 330 g	12.3 oz 350 g	12.9 oz 365 g
Dimensions	70.1 x 31.5 in 178 x 80 cm	76.0 x 31.5 in 193 x 80 cm	78.0 x 31.5 in 198 x 80 cm
Packed Size	4.5 x 7.5 x 4.5 in 11.5 x 19 x 11.5 cm	4.5 x 7.5 x 4.5 in 11.5 x 19 x 11.5 cm	4.5 x 7.5 x 4.5 in 11.5 x 19 x 11.5 cm
Fits Up To Height	5 ft 6 in 170 cm	6 ft 185 cm	6 ft 6 in 198 cm

Frequently Asked questions

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

The added warmth depends on how well the sleeping bag retains heat and how well the sleeping mat insulates. When paired with a quality bag and mat, a Reactor Midweight can add up to 6 °C / 11 °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 Midweight work as a stand-alone sleeping bag?

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

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