17%pepperspray allows you to fight off attackers from a safe distance. A one second burst to the face will cause temporary blindness, choking, coughing, and nausea-bringing the attacker to his knees. The active ingredient in our spray is Oleoresin Capsicum (O.C.), commonly referred to as red pepper. At 17% and two million S.H.U., Street Wise pepper spray is the hottest, most powerful in the world. The potency of this spray enables it to bring down even the most aggressive assailants.