ALPS Mountaineering Hydro Trail 17L Hydration Backpack - Lightweight Hiking Daypack for Men & Women - Perfect for Trail Running, Camping & Outdoor Adventures

This is an excellent day pack with lots of room and the expandable straps allow for great buttoning down or expansion of pockets to allow for more carrying capacity. The zipper are made of strong material and the bag material itself is made of high quality material.. The best part of this bag is the water bladder, the design of the opening allows for easy access for filling and cleaning the bag. Most of all I love the drinking hose, it's very well made and has plenty of tie downs to keep it from flapping about when running or walking. I can't say enough about this backpack.. If I had one gripe it would be that the waste strap is not removeable. I knew this before purchasing so it should be noted that I knew this before hand I'm just saying this as I wish it was an option in case anyone has a question about whether the waste strap is removable, it isn't.. Other than that a great purchase, a great bag and I would definitely recommend.