Extra money? I don't pay retail so there is no extra about it for me. I have a dakota series pants , coat and bibs and didn't pay over 120 for all. One of the way's the clothes works is in it's very tight weave. The Dakota series clothes are first rate very warm and extremely wind resistant. That I suspect is one way the keep odor's down. If the wind can't get in, odor can't get out. If you don't wear them properly they won't be as effective. If worn properly, what the Doc described will most likley be only known to the wearer. I would wear them even if the scent lok didn't have any effect, they are very comfortable, but as for me I have seen good results when wearing them and will not hesitate to say otherwise if and when I feel they are not. I don't expect them to do anything more than give the deer the Idea that I am farther away than I really am, as a bow hunter that is a real plus.