Apple may have settled on iPhone 17 Air as the name for the rumored skinny iPhone that’s expected this fall, reports Bloomberg’s Mark Gurman in today’s Power On newsletter. He writes that the phone will be “a testing ground for future technologies,” including the tech that leads to the company’s first foldables.

The name wouldn’t be surprising — both the MacBook Air and iPad Air were the thinnest versions of their lines when they were released. The iPhone 17 Air is expected to carry that forward by being “about 2 millimeters thinner” than current iPhones, Gurman has written. Other recent rumors have put it between 5.5mm and 6.25mm thick, which is close to the M4 iPad Pro’s depth and less than the thinnest iPhone so far, the iPhone 6.

The thinness isn’t just a flex — realizing it will help Apple along toward future foldable iPads and iPhones, Gurman writes. And he says the phone could be one of Apple’s first proving grounds for its in-house cell modem, codenamed Sinope, after it debuts in the iPhone SE this spring. This year’s iPhone lineup is also expected to debut Apple-designed Wi-Fi / Bluetooth chips, though Gurman doesn’t go as far as saying that includes the 17 Air.