Nothing is full proof against a whitetails nose. The activated Carbon is not 100% full proof and i think people need to understand that, it is just one of many steps the average hunter takes to minimize his/her odor. The carbon might not stop the smell but due to the nature of the product it filters/slows down release of smells. Wearing carbon, along with playing the wind and cover scents, taking showers to clean off are all simple steps the average hunter knows they must do to try and minimize the effects of there smell "stink". but nothing is full proof, but a little help is better then none at all.