The Mackie SRM450C300ZB is a durable carry bag for the SRM450 and C300Z loudspeakers so you can transport them comfortably and conveniently. This lightweight bag features an easy access port hole with a covered flap on top which allows you to grab the speaker handle without having to open the bag for transporting and set-up, a large zippered accessory pouch on the front for any extra cables or PA accessories you may need amd a removeable padded shoulder strap.