I'm gonna have to disagree with some of you. Of course people have been killing deer for hundreds of years with out carbon suits. People today still kill tons of deer wearing gas soked boots with cigertte smoke inbeded in their clothes. It really depends o several factors. the first being the wind if you can get down wind your fine, but lets face it you cant always hunt a perfect wind. The carbon suit is the final layer of defense against a strong human oder hitting the deers sniffer or a sutile wiff. I've used the suits for 3 years now and know 100% that they help. Nothing will cure all but it works. If you follow the care instructions the suit will last for sevreal seasons. Use the suit in conjuction with scent nuetralizer, and no scent bath soaps and you'll enjoy more sucess!!