These are amazing canyon packs.

The 55L Canyon pack is a good size for trips requiring more gear and is comes in a few different styles. To ensure quick drainage and to avoid lifting heavy packs each time you exit a pool all packs come with a range of drainage features. The base of this pack has multiple holes and the sides come with either side grills made from reinforced PVC on each side. The flap hood provides a streamline zippered pocket on the inside that is suitable for few smaller items such as a waterproof camera and sling. The flap hood also has an adjustable overflow strap enabling extra load to be carried on the way in/out of the canyon when required.