Hydration Pack Including 2L BPA-free Water Bladder. Perfect Hydration Backpack For Cycling, Running, Hiking or Biking. Light Weight, Durable And Water Resistant. For The Adventure Seeker Who Won't Settle For Second Best Be Free To Explore The Great Outdoors, And Stay Hydrated Wherever You Go Lightweight Comfort That Allows You To Focus On Your Running or Cycling Without Having To Carry a Water Bottle Water Resistant, So No Rainy Day Will Stop You From Reaching Your Goals WATER BLADDER: Includes 70 oz / 2l bpa-free water bladder. The hydration bladder makes use of a slide seal system. When it is open you have a big opening for adding ice. When it is closed it creates a water tight seal that ensures no leaking. Removable bite valve and hose makes cleaning of your bladder very easy. Just press the release button and you can easily pull it out