Grüezi Bag

Sleeping Bag Warmer

<p>The Grüezi Bag Sleeping Bag Warmer is a travel sleeping bag for all occasions.</p><p>You can either put it in your sleeping bag as an extra insulation layer or use it on its own. If you use it as an extra layer, you can increase the internal temperature in the sleeping bag by up to 10°C.&nbsp;</p><p>Inside and out, this sleeping bag warmer benefits from a particularly soft fabric that doesn't rustle. It can be compressed very small - more precisely to a packing volume of up to 3.5 litres - and thus fits in any backpack or bag.</p>