The Atomic NORDIC THERMO BOTTLE BELT, are a really efficient way to carry all your essentials without weighing you down. The padded bum bag has a front phone pocket and a removable thermal sleeve with a roll-top closure for a Push & Pull drinking bottle (which is also removable-and dishwasher safe). This season, the bum bag has been improved to be even more comfortable. And there's a small pocket on the side for your car keys.