Product Description The Switch MB fits the MacBook 13.3-Inch and MacBook Pro 15.4-Inch. It features a high density notebook compartment, a removable and ergonomic shoulder strap pad, an earbud management system and storage pocket, an easy access side pocket, a front organizer panel for your daily accessories, a backslip pocket for additional files and newspapers, a top handle which makes for easy carrying, and most of all, interchangeable and reversible flaps! To change the flap design, you just flip it and clip it. And to get even more looks, just purchase additional flaps from Brenthaven.com.Along with customization the Switch MB comes with the option to add an array of interchangeable utility pockets that attach to the side of the bag for necessities, including an ac adaptor pocket, a small digital camera pocket and a mini hard-drive pocket. All attachments come with a buckled clip, which hangs onto the right side of the messenger base. Also available is a biker strap and clip, a reflective biker tail and a Wacom Sleeve attachment. Additional flaps and accessories available on Brenthaven.com