Osprey Rev 1.5 Hydration Pack Small Hiking Running Triathalon Backpack M/L Gray This does NOT include the reservoir/straw - this is the backpack only. Color is a sort of gray/lime green color. Gently preloved condition. -Magnetic bite valve stays put on sternum strap; hose disconnects quickly so you can refill the reservoir faster -Pack's gear capacity is 1 - 1.5 liters, depending on size purchased -Biostretch™ Body Wrap harness is lightweight and super comfortable as it moves with you -Highly breathable mesh back panel has soft contact surface -Removable DigiFlip™ media pocket on chest flips open with a protective clear cover so you can instantly see any messages -Stretch-mesh shoulder strap pockets stow energy snacks; stretch-mesh side pockets; zippered top slash pocket -Bungee cord on front panel of the Osprey Rev 1.5 Hydration Pack stows a lightweight jacket or hat