THINK ROYLN Bum Bag Crossbody - Cross Body Handbags : Black Patent 1 : Whether it's worn as a fanny pack, a crossbody, or a bum bag, the THINK ROYLN Bum Bag Crossbody adapts to your needs and style on the fly. Polyester construction is lightweight and durable. Shiny coating gives each bag added pop. Zippered main compartment with slip pocket. External pocket for quick storage. Quilted design with down-like polyfil. Two webbing straps with adjustable design and metal hardwear. 100% polyester.