Aonijie SD 57 Insulation Water Bladder is best suited for 2 extreme weather conditions: extreme hot like Summer in UAE & extreme cold such as expedition in mountains when the weather goes down sub 0 degree.
Both the water bladder and the water tube are insulated. This prevents the cold water from being heated up in hot weather, and room temperature water from frozen up in freezing condition.
Water bladder come in 2 capacities: 1.5L & 2L
