This bag easily holds 2 laptops, maybe 3.  It has one nicely cushioned pocket. Other laptops would need protective cushioning from the handle bar inside the case. The inside fits my 18 x 10 laptop snugly, without a protective case. Or I could just put the laptop in the cushioned pocket. The case fits under seat or overhead, I've had no problems even with smaller commuter jets. The case nicely piggy backs to the matching 21" carry on. Attaching both makes it a little top heavy, so I push the carry-on with its 4 360-degree wheels, rather than pull it and stress the handle. This case just has 2 wheels - which don't interfere with the 21" handle. A little bit wobbly so they give a little velcro attachment to tighten up the sleeve. Careful, the bottom 360 degree wheels move so easily, the bag runs away on a slant or on trains lurching.