Trim Changer Very slim bag profile, fits close to body Removable padded insert & dividers: The dividers can be removed from the insert and reattached inside of the bag. Items like teleconverters, batteries and other photographic and computer accessories simply don't need much protection, so you can reduce the bulk of the bag by taking out the padding Includes "Rotate or Lock" mechanism: Modulus accessories are designed to "Rotate" or "Lock" on the Pro Speed Belt. This is a tremendous advantage is have this type of functionality. Most photographers "Rotate" the bags on the belt, preferring not to lock them into position Front mesh pockets for lens caps: The stretchable mesh pockets are designed for items that you need to remove and retrieve quickly while shooting like lens caps. They are also handy for other essentials like sunscreen, lip balm and other small items Webbing shoulder strap attachment: All of the Modulus components have two webbing tabs at the top of the product. Either of the shoulder straps can be attached so that it can be used as a shoulder bag. The Light & Fast shoulder strap will work the best for most items