Dead down wind is the same as you buy in liquid- just powder you mix yourself. Great concept.
Reviews are tough on such items- "Do they really keep animals from smelling you?" Doubt it. But seem to help me not smell to ME.
Doubt hunting/hiking in mountains could ever be done scent free. However- the BEST product I have ever used that does cut down my scent to ME (days of hard use and my shirts are not a locker room!) is the Scent Shield Hair and Body Deodorant LOTION. 15+ years- all seasons, all hunts, AK last year, and even non-hunting trips. The lotion gets into your skin, moisturizes, limits any chaffing, and really does keep your clothes from stinking. Not sure why it is not discussed more. Been using it for 15+ yrs. A 2-3 oz. bottle was the bomb in AK last year for underarms and crotch.