With its mummy shape and Thermolite® Pro fabric, the Reactor Black sleeping bag liner uses new infrared technology combined with a comfortable stretch fabric to provide greater warmth, versatility, and insulation. Ideal for cold conditions.

With its mummy shape and Thermolite® Pro fabric, the Sea To Summit Reactor liner uses new infrared technology combined with comfortable stretch fabric to provide approximately 12% of more warmth, versatility and insulation.

The Polartec® Micro sleeping bag sheet from Warmpeace improves the insulation capacity of your sleeping bag, plus it is very light and compact, it will be forgotten in your backpack and will be effective in case, an essential accessory for bivouac in winter!

Boost the temperature of your sleeping bag with the Mummy Reactor Extreme W sleeping bag sheet from Sea To Summit. much more compact and lighter than a fleece bag, it increases the temperature of your sleeping bag by around 15°C!

The Radiator sleeping bag sheet from Cocoon increases the temperature of your sleeping bag by 9°C, plus it is very light and compact, it will be forgotten in your backpack and will be effective in case, a essential accessory for bivouacs in winter!

This WILSA fleece sleeping bag sheet allows you to increase the temperature of your sleeping bag by 5°C.