Why do basketball players wear hoodies/long-sleeves on the sidelines?

Regardless of whether or not the player has already been on the court or started on the bench, many NBA basketball players will wear a long-sleeve shirt or a hoodie while sitting on the bench.

Including but not limited to players like James Harden, LeBron James, and Kyrie Irving – usually wear some sort of long-sleeve shirt while on the bench.

At first glance, shouldn’t returning players’ top priority on the bench to ‘cool-down’, regain energy to go back in (especially the star players), and dry whatever sweat is on their body? I don’t understand the purpose of wearing a hoodie on the sidelines after playing x amount of mins. I feel like wearing a hoodie while sweating profusely will only heat the body up more.