While Apple's 29W USB adaptor works well. Anker's 30W adaptor works just as well at a fraction of the cost. iPhone 8, iPhone 8 Plus, iPhone X, and iPad Pro all charge faster with this adaptor. You'll also need to grab a USB-C to lightning cable to go along with it.

Anker has become my go-to brand for iOS accessories, so I can trust anything they release.

Get it on Amazon for $23.