Camelbak Arete 18 Hydration Pack 18L with 1.5L Reservoir
Hydration Type: CRUX™ Reservoir. Hydration Capacity: 1.5 L / 50 oz. Torso Fit Range: 38 - 53 cm / 15 x 21 in. Gear Capacity: 16.5 L / 1000 cu in. Side Stretch Pocket: Expands for extra water bottle or essentials.