Apple’s recently published User Guide for the Apple Watch appears to reveal that Apple is planning an authorized program for non-Apple branded Apple Watch straps:
Apple is yet to announce such a program, but such an offering for the future makes sense given Apple’s official “MFI” accessory programs for the iPhone, iPad, and iPod. A marquee feature of the Apple Watch is its ability to be quickly attached to various bands via a standard connection on the two sides of the device.
While Apple has not yet announced an authorized program for third-party bands, some enterprising accessory makers have already announced bands ranging from unique leather designs to bands that pack in backup batteries for on-the-go charging. Apple sells branded straps such as the Link Bracelet and Leather Loop.