The altura vortex 25 is a fully seamed waterproof back pack that is bursting at the seams with features and functions that make for a great bag first off the bag is fully waterproof keeping everything within the bag safe and dry the bag has a large opening which makes it super easy to access and remove from the bag inside the bag is a removable laptop sleeve that fits 13 and a tablet sleeve and thanks to the large opening is easy to place in the bag and also remove the main opening and a