My sons spend roughly 5hrs a day in their boots. I am convinced the smell coming from those boots, is something scientists could study in their labs for years to come ha ha. My sons knew the rule: no boots left in the car, and definitely no boots allowed in the house. These pouches have however changed all of that. Boots can live inside again. No more cat wee mixed with exotic plants smell coming from them. Only thing we can smell is the lovely Sandalwood scent from these fresheners. It's a win!