I'm not saying this to be funny or anything. I am lactose intolerant and I have the worst gas on the planet! Almost made my boss puke once! Anyway if i crap my pants and I'm wearing carhartts ice fishing or something it smells bad, i might take a while but it comes out. But when I'm wearing my scent lok suit I DON"T SMELL ANYTHING! I have used the same one for four years, I put it the dryer about 4 times a season the face mask about 8 times. I don't have my masters degree in thermal dynamics like some of these guys that know how hot the carbon has to be in a scent lok suit to release scent. I just follow the directons ont the suit and it works for me.