The Grüezi bag Youth Sleeping Bag Warmer is a small and lightweight insulation layer that can be used inside a sleeping bag or as a standalone piece. Weighing just 350 g and with a pack volume of 3 liters, it is the ideal travel sleeping bag for any situation. This way, you can always sleep in your own bedding. It is recommended as a travel sleeping bag for hotels, on buses, on airplanes, for overnight stays with friends, or for summer camping. The Grüezi bag Youth Sleeping Bag Warmer also works excellently as an additional insulation layer inside another sleeping bag. Both the outer and inner materials are made from a very pleasant, soft fabric that does not rustle. The airy ARL-3D insulation compresses to a very small size, ensuring there is still room in any backpack or travel bag. The high-quality microfiber filling from Grüezi bag provides strong loft, which is essential for trapping air. Air insulates and ensures pleasant warmth. The three-dimensional structure of the filling also allows for moisture transport to the outside, creating a pleasantly dry climate. The filling is robust, durable, and resistant to moisture, while also being lightweight and easy to compress – small pack size with excellent insulation.