Shop the Bayswater Backpack in Clay Leather at Mulberry.com. The Bayswater is a Mulberry icon. Launched in 2003, its simple structure, timeless design and signature postman's lock made it an instant bestseller. Converted into an elegant backpack style, it features adjustable side gussets with press studs to extend capacity or streamline the shape. This versatile style can be worn on the back, over the shoulder or carried by hand.