A couple years ago I purchased a pair of rubber boots from BPS that said scent free on the boot and the brochure. Cost $79 made in China. About 2 weeks before gun season I walked across a food plot to check a trail camera then decided to stay in a box stand to see where the deer entered the plot. About 15 min later a mature doe and two yearlings entered the plot. The yearlings grazed past my path. The doe stuck her nose in my tracks raised her head and snorted. Moved into the underbrush and snorted for 15 min. You could hear her for for 300 yd. Maybe the Chinese don't field test their rubber in the USA. How about spray on scent blockers?