This Insulated Cooler Bag holds 2-2.5 Liter water bladder perfectly by protecting it against any damage.Insulated material keeps the water cool for a few hours in hot summer or keeps your water from freezing in winter.Perfect for cycling,backpacking,hiking,camping,marathon,kayaking,biking,mountaineering,skiing and snowboarding etc. Specification: Color: Black/Army Green/Khaki/Camouflage (optional) Material: Polyester Size: 44*20cm/17.3*7.9in Weight: Approx. 100g/3.5oz Package List: 1* Insulated Cooler Bag