Sea To Summit Reactor Midweight
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Sea To Summit Reactor Midweight

Thermolite Pro fibre sleeping bag liner, providing an extra 6°C of warmth to protect your sleeping bag. With the option to slip your arms out.
€60.40

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Availability: In stock & Available in our store

The opinion of Aventure Nordique

The Sea To Summit Reactor Midweight is a sleeping bag liner that enhances comfort and warmth. The manufacturer claims it provides an increase in insulation of around +6°C. This is a significant improvement; in our experience, this sleeping bag liner provides an increase in warmth of around +6°C. It can be used in winter inside a sleeping bag, on its own in summer on warm nights, or in a mountain hut.


For added versatility and comfort, this Reactor Midweight liner features arm slits and a drawcord in the hood.


The Thermolite Pro fabric is just as effective as fleece, but has the advantage of being lighter and more compact. This bag replaces the traditional fleece, cotton or silk sleeping bag liner. Ideal for hiking, camping… HeiQ Fresh technology provides long-lasting odour control.



Points to remember

A sleeping bag liner made from Thermolite Pro, featuring a drawstring at the foot end. The Reactor Midweight Liner adds 6°C of warmth and protects your sleeping bag. It can be used on its own in summer or in a mountain hut.

Technical details

Brand Sea to Summit
Product name Reactor Midweight
Form Mummy
Fabric Thermolite
Material Thermolite Pro, 100% recycled polyester
Colour Grey
Length User size : S : 170 cm - R : 185 cm - L : 198 cm
Width 55 / 80 cm
Machine washable Oui
Folded 11,5 x 19 x 11,5 cm
Weight S : 330 g - R : 350 g - L : 365 g
Warranty 2 years

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