Chlor Free Shock & Swim 15 (Non-Chlorine Oxidizer) - Swim after treatment in as quick as 15 minutes. A neutral buffered potassium monopersulfate compound that provides superior oxidizing for sparkling clear water. Turns chloramines into active chlorine. chlor free is non-chlorine and non-bleaching. Compatible with all treatment systems: chlorine, bromine, copper, silver ionization and chlorine generators. Will not raise chlorine to unacceptable levels.