Had never heard about prickly heat until I accidentally came across it. Being a heavy chested girl living in a warm humid area I often suffer from heat rash across my chest. The other powders and creams that I have tried would sometimes work for a little while but I always ended up feeling itchy and sore with exception of Aqueos cream which stopped the itchy/soreness but always resulted in a funky sweaty smell now factor in that I'm tall enough so that most people's nose are inline with my boobs...well lets just say I was always trying to avoid close encounters in small rooms. Luckily I gave prickly heat a try. The talc is very thick stuff bit like crushed chalk and it has a mentol scent. When applying it spreads easily, and the thicker the application the quicker & more intense the cooling effect. I have been using this for four days now. I apply a dusting to my chest and rub the residue from my hands over my tummy and back, and have noticed that there is very little sweating (if any) in the area to which prickly heat has been applied, definately no rash and no funky smell. Haven't really tested it in a situation which would normally make me really sweaty/heated like a hot crowded room or the club but I'd still recommend this powder.