This is a water-cooling suit that was released last year! I've used it about 15 times in total. There are no problems with its operation. The water tank has some swelling due to freezing, but I don't think there's any problem. After each use, I washed the bag and drained the water from the tubes. Black cool vest with cooling packs. - Color: Black - Included: 2 cooling packs - Function: Cool vest Thank you for looking.