Police Force Streetwise 23 Pepper Spray has a CHR of over 230,000 SHU (1.47% Total Capsaicinoids) making it one of the hottest, most effective self-defense sprays on the market. For comparison, the independent laboratory tested competing brands. They found the average heat rating to be 123,000 SHU, making Streetwise 23 over 87% hotter than the competition!