Osprey Daylite Plus Custom Backpacks, Night Shift Blue color_Timbuk2_2550 55L low profile design with a hook Powerstation Plus Ultra low profile design with a hook and loop closure Features: 2 layer construction 100% Merino wool exterior Flatlock seams for ideal comfort and durability Non itch fabric Shell: 57% Merino Wool 15” laptop or tablet Dual side compression straps Dual water bottle side mesh pockets Front pocket with organization and key clip Front panel zippered slash pocket Front panel shove it pocket 20L Capacity Backed by Osprey’s All Mighty Guarante PVC Free Product Large panel loading main compartment Attaches to a variety of compatible Osprey packs Multifunctional interior sleeve for a hydration reservoir accommodates a 2L reservoir (not included)