There are two most common styles of Apple Watch: Those with a raised bezel and those with a screen protector.
Raised Bezel Cases: Offers protection by means of not letting the screen get damaged by the impact from being dropped.
Screen Protector Cases: Offers more well-rounded protection, such as from when something sharp is dropped onto the screen, or from spills or your own oily fingers.
That said, raised bezels are more common, have better looking options, and won’t affect the sensitivity of your watch’s touchscreen. In either case—yeah, a pun there—they’ll provide access to every button with precisely fitted cutouts around the case.
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