I am with you Doug. First, cover scents don't cover anything. Dogs can track a person through all different scents and I am sure deer can too. If you put fox pee on your boot, they smell you and a fox.

As for scent blocker clothing and sprays, I don't buy into those either. People smoke, drink coffee, eat, etc while wearing their hunting clothing and that clothing absorbs all of those smells. So even if a scent blocker suit can block smells from internally, it isn't going to block the smells on the outer layer. Also, the sprays claim to kill human odor, not food and drink odor.

Hunting the wind is the only sure bet and it is free.