iPad screen protectors

I bought an iPad Air 2017 as an upgrade from my iPad Air that I’ve had for about four - five years. I’ve been looking at glass screen protectors (as opposed to the plastic film I installed on my old iPad) on amazon and have found a "brazillion" of them! So I’m looking for recommendations in order to narrow down the selections. I like the idea of "two-packs" as I intend to take my older iPad with me when I travel, as it appears the fit is the same. Opinions, anyone?