Hi, Unfortunately, I do not know of any leather protector. I immediately blot any moisture in the leather so that it won't get absorbed. Mine has a darker color because of the Apple care lotion that I applied to the bag.Hi, I have the exact Nomade Noe and I live in Malaysia. So I know your concern when it comes to weather lol. Yours look slightly darker color than mine. If u have any idea how to protect the leather against water, please share with me. Thanks.