This breast pump bag literally does it all, which is why it is appropriately named after Sarah Wells' mom "Kelly" who manages to look sharp while taking on just about every job imaginable. The Kelly breast pump bag is BOTH a backpack AND a shoulder bag. The backpack straps can be tucked away in the backside tall velcro pocket to reveal a chic shoulder bag. The double shoulder straps can be tucked away in the front and back pockets to show off the sporty backpack feature. Or leave them both out for the most versatile breast pump bag around! Not only is this bag convertible, the dedicated breast pump pocket is also large enough for hospital grade pumps, as well as all portable pumps on the market. Inside is a padded laptop pocket that will hold up to a 17" computer (seen in photo). The Kelly has a whopping EIGHT pockets for organization, including an awesome expandable water bottle pocket that can hold up to TWO water bottles (or sippy cups, baby bottles, etc.). Enjoy!