Cass Creek Harmon Scents Fox Roll-On Scent Stick is a 3-ounce solid rub-on scent stick with Harmon's real-pure fox urine. Fox cover is used for hunting deer or hunting foxes. When the urine is pure, it smells pure. Harmon Scents are always pure - never diluted. A lot of dogs in this country have been trained on hunting foxes using Harmon Fox urine as well. Harmon Scents Roll-On Fox Scent Stick stays fresh for up to 2 years. Harmon Fox Roll-On Scentk can be rubbed on brush, leaves of a tree, drag rags, scent wicks, decoys, bottom of boots, and trees.