OutdoorMaster Messenger Bag Shoulder Bag Crossbody Bag Canvas Bag School Bag Riding Bag with Quick Connect and Release Strap ( DarkBlue ) Size(full filled): 11.8x9.8x5.5 inch Quick connect and release strap, it's convenient to storage and take out items when riding Thicken and heighten bottom of bag to make bottom more flat so that easy to place Main bag with zipper is more secure, barrier bag use velcro for more convenient and practical There is zippered pocket in front, you can place keys and other small items