Looking for the greatest flexibility allowed by the laws of the great outdoors in a hydration pack? You’re looking for the Osprey Glade 5 w/ Reservoir. This pack comes with an Osprey Hydraulics® LT 2.5L reservoir by Hydrapak and an insulated reservoir hose and bite valve cover for winter use, an easy-access accessory pocket, and an internal zipper stash pocket. Designed for in-bounds skiing, fat biking, cross-country skiing or snowshoeing this has a stable fit for active use with an Atilon framesheet suspension, a removable webbing hipbelt, and, because we’re talking “snow sports” here, a snow-shedding backpanel material for reduced ice and snow buildup. A summer biker’s hydration pack is going to have a mesh vented backpanel, and a tool organizer pocket, so let’s assume this is going to be less comfortable on a sticky summer ride than a pack designed specifically for summer. But this will do you just fine this spring and next autumn, for shoulder season bike rides and fast hikes. This is built to take on snow, cold, and trails. A low profile fit makes this safe and comfortable for lift serviced skiing, yet leaves you with the space you need for water, snacks, your wallet, and a multi-tool in case something goes awry out there.