Kate Spade Lake Medium Convertible Backpack Kate Spade Lake Red Medium Convertible Backpack designed with both beauty and function in mind. The soft pebbled leather gets even better looking over time. A push-lock flap opens to a roomy interior lined with the trademark kate spade flower jacquard and filled with pockets to organize all your stuff. Adjustable shoulder straps come off so you can carry it as a backpack or by the top handle, like a handbag. Attach one of those straps to each side and wear as a crossbody.