Osprey Backpack Skarab 18 Water Reservoir Bladder 2.5L Hiking Travel Green Blue For quick hikes on local trails, convenient hydration makes stretching your legs-and the miles-a breeze. The Skarab 18-liter is a no-frills hiking pack that is comfortable for moderate hikes and daily exploration. Wide-mouth, bucket-style main compartment opening. Front panel daisy chain attachment points. Adjustable sternum strap with magnetic bite valve attachment. Internal hydration sleeve with an included Hydraulics LT 2.5 L reservoir. Underlid zippered mesh pocket with key clip keeps essentials handy. In very good condition. Only used once. Little to no signs of use. No wear. Water reservoir never used. Plastic still covering mouth piece. A few very small marks on the bottom. See last picture. Color: Green Blue