I live in Malaysia and it is extremely hot here but I guess I am just so used to wearing watches with leather straps. I bought a Daytona yesterday and am even contemplating on putting a rubber strap on it as I am just not used to wearing a bracelet. The 5131P is already different as it has a different type of map altogether. I think Patek was also trying to make more money apart from trying to make the P different from the other 5131s.