The MacBook Air 13 (or MacBook Pro) is snugly inside, held in the corners by two strips of clear plastic on top and two elastic bands below. There un'housse identical designed for the Retina MacBook, so make sure you buy the right one for your Mac. No need to remove it to use your Mac. Just open the zipper closure bilateral and use your mobile as usual. Side ports are available for devices. This specialized coverage will protect your Mac in transit and at home / office, but there is no side pocket for accessories. However, at this price, it's a beautiful bag that I love.