Caterpillar (CAT) fleece-lined canvas work pants

Very comfy, but the black canvas gets UV-damaged very quickly — I wouldn't recommend this color, but the khaki-colored pants stay looking pretty great.
Watch my video review on these CAT-branded, jean-style pants
And yes, while many things get damaged by UV rays, this happened way sooner than almost anything I've owned; I have black clothing that's deep black after months or years of use.
I believe these may have been a Costco-exclusive, but there are other cool fleece-lined pants on eBay too.