Now there’s one less reason to avoid traveling with your CPAP machine. Human Design Medical just released the Z1, which is touted to be the world’s lightest and smallest CPAP machine. Weighing in at 10 ounces, and measuring 6.5 x 3 x 2 inches, it’s also quiet at 26 decibels. If you order the backup battery pack, it only adds 2 more inches to the thickness and weighs 28 oz.