There's a product called Coolshirt that does this. Ice water from a small cooler is circulated through tubes in a vest that you wear. I heard about them in a

There's a product called Coolshirt that does this. Ice water from a small cooler is circulated through tubes in a vest that you wear. I heard about them in a motorsport context (race cars typically don't have AC since it adds weight and the compressor uses a significant amount of engine power) but apparently they're marketed to firefighters and industrial workers too: https://www.coolshirt.com/ https://www.coolshirt.com/