20 / 28 mil liner?

Which should I go with? Either 20 or 28 mil vinyl liner.

Pool size 17 x 33

Thanks

Barring price I would go with the 28 mil liner. They will hold up better and useally have a better warranty.
Steve

So as for stretching issues. 28ml will just hold better, But if it is not able to give any (stretch as good as 20ml) while being stretched like the 20ml, would the 28ml will more likely rip b/c it does not giveas much?

I didn’t install mine but I feel that a correctly fitted liner shouldn’t have to stretch to the ripping point. I understand that heat from the sun will help the liner stretch and form better.
Steve