After using most all the commercially available scent products I had decided tonot use any, until two years ago I discovered a scent company ( deer farm), Southern Whitetail Scents that collects fresh deer urine from the current hunting season. Since using their products my boys and I have harvested some really nice bucks. I think the fact that it is collected fresh, refrigerated and no preservatives are added makes it retain more of it's original smell than the others. We only use this companies scents. www.southernwhitetailsccents.com