Adidas power 3 backpack the adidas power 3 backpack is ideal for chucking your gym kit when heading off to the gym the main zip compartment features a padded laptop sleeve with a smaller hidden zip pockets keeps any smaller belongings stored safe the compression straps on the side of the bag allows the pack volume to be adjusted padded straps ensure it can be carried around with ease backpack main zip compartment padded laptop compartment hidden zip valuables pocket me