This strap fits perfectly to your PAM 311.
Personally, in humid summer weather I prefer a bracelet or regarding Panerai a leather strap, where you can see the sweat and the discolouration (patina) caused by moisture and water (which is part of the look and design).
Like that:

(I'm sure die-hard „strap specialists“ like Ahoi could provide better examples… LOL)
For that an alligator strap would be too elegant and delicate for me. But that's just my personal taste.
Enjoy your beautiful PAM with alligator strap!
Thomas