rar could refer to a few different things depending on what you're working on.
Is this a or custom content for a game like The Sims ? KS_Denim.rar
Or is it related to a specific or archive (as there are fabric retailers like KSDenim on Etsy that sell physical Japanese selvedge denim)? rar could refer to a few different things
To make sure I give you the right information, could you clarify what this is for? For example: KS_Denim.rar