Check the listing for details. NWT KBNI Hydration Backpack with 2 Litre (68 Ounce) Water Bladder, Sky Blue. Color: Blue, Condition: New with tags. Listed at 12.50 USD. NWT KBNI Hydration Backpack with 2 Litre (68 Ounce) Water Bladder, Sky Blue KBNI Hydration Backpack is your best companion when it comes to keeping hydrated while doing the things you love! Keep active in comfort - whether you are camping, hiking, running, climbing, hunting, outdoor sports or boating!Breathable! The breathable back-panel ensures comfort even on the warmest Australian summer days, with a total weight of 400g, to keep you light on your feet.Comfort! Designed for ultimate, long-lasting comfort with a soft cushion on the rear of the backpack supporting your back, and comfortable, adjustable shoulder straps so you can move freely and confidently knowing you backpack is secure.