i do not claim that they work as they say they do on the advertisement campaigns but i feel they do work to a degree. i have had a great number of deer come from down wind of me and were nervous or even aware that a scent was in the air but it was not enough to spook them. eventually coming in and giving me a shot. could be many things that caused this i know but i attribute it to me scent control regimine and my scent 'contain' clothing.