Deuter Light DryPack is a very useful accessory when packing for a trip to the mountains, biking, or simply for any travel. This Deuter pack sack is very light, yet carry plenty of volume. Light DryPack comes in various sizes and colours, each model representing its specific sizes. Every model has a roll-up closure: to be rolled down at least 3 times before securing with buckle. 5-litre version fits in backpack lid compartment. 20-litre version fits in backpack bottom compartment. The pack sack provides efficient packing thanks to rectangular bottom shape.