A biodegradable leader sink paste developed for the South Fork and the Henry's Fork of the Snake River and for spring creek fishing in Idaho and Montana. Created to help your leader break through the water's surface without spooking wary fish. Snake River Mud sinks your leader but not your dry flies. Also helps nymphs and wet flies sink faster. Just dab a little Mud on your fingers and rub along the first few feet of your tippet when fishing dry flies. Will not discolor your tippet and odor-masking pheromones will hide your scent. Packaged in a 1/4 oz flip-top tub.