This Muddyfox 1.5L Hydration Pack is ideal for keeping hydrated on long-distance runs, hikes, or cycling trips and lets you bring along a range of essentials. Separate cargo and bladder compartments allow for ease of use, while the lightweight mesh straps and buckle closures ensure a great whenever you put it on. 1.5 Liters. Separated cargo and bladder compartments. 1.5 Liter bladder included . Padded back . Chest straps . 600D Polyester ripstop fabric. Imported.