Pepper foam enables you to defend yourself while keeping a safe distance from an attacker. A one-second burst to the face will cause temporary blindness, choking, coughing, and nausea -- bringing attackers to their knees. All of our pepper sprays are two million S.H.U., which is the highest available. At 17% and two million S.H.U., ours is the hottest, most powerful in the world. The potency of this pepper foam enables it to bring down even the most aggressive assailants. We have combined the stopping power of our 17% pepper spray with a temporarily blinding blast of foam. Pepper foam is much heavier than pepper spray and is less susceptible to being affected by the wind. When sprayed, the foam expands over 600% of it's original volume, totally engulfing the face of the attacker. Having this self defense weapon conveniently attached to a key ring means no wasted time searching for it.