Hydration Backpack - Insulated Water BladderHydration pack backpack with Water Bladder. Clean your water backpack, daily, weekly or whenever you want. Features: If you've been looking for a lightweight, compact, and stable insulated hydration packs, then your search is over! That's because our running water backpack has an athletic low profile design that wont create a ton of wind resistance or bounce when your running, biking, hiking or at festivals. The Padded Mesh backing, and straps helps