Review on Gregory Mountain Products Backpack Catwalk by Tim Harris

I use it on a 15 mile hike in the heat. It easily fits 3 additional water bottles with a 3 liter bladder. There was room for my snacks and a cooling towel and plenty of space. I will use it to hike the Grand Canyon from end to end. Note to manufacturer: 1) Photos on the web do not correspond to reality, 2) Bubble pocket has a small zipper. It was embarrassing to put a full bladder back in the backpack. Even adding 1 inch to the zipper would help. Despite these two issues, I highly recommend this backpack.