I like the official Apple versions....You can get silicone covers for current models from AliExpress.
I use a Magic Keyboard as a dock, and when I take the iPad somewhere, the Apple plain magnetic folio for basic protection (magnets are fun!). I also have a Logitech Combo Touch, which is brilliant (fans of the Surface Pro will appreciate it). But I stuck with the Magic Keyboard, as it can charge the iPad through the keyboard's power port, as opposed to needing to plug the charger into the iPad's USB-C port for the Logitech.
Okay, I get that, but if Apple doesn’t make a silicone cover and you still want a silicone cover…I like the official Apple versions....
Black Silicone on my iPhone and iPad.
Recent studies have shown that women who carry around a little extra weight have a longer life expectancy than men who mention it.My wife likes the extra bulk (no pun intended) and she's clumsy as hell, so she always uses a case.