MAMMUT Backpack Woman XS - Brand: MAMMUT - Model Name: SAVE YOUR ENERGY - Accessories: Dedicated rain cover attached to the bottom of the backpack, removable. The back has mesh, which helps to reduce stuffiness. It appears to be the type that can hold a water bottle for hydration while wearing it, but I have never actually used it. I have used it several times, but I think it is still usable. Thank you for looking.