A military chem suit not only keeps biological and chemical weapons from getting out, but traps the body odors in. I have worn one when hunting for the past 3 years. I have had deer stop within 15 feet of me with the wind blowing across my back and into their face and not got burnt. I wear normal hunting boots sprayed with scent kill too. Whether you accept it or not, I found it works and it was worth the $15 I paid for it on e-bay.