Otter Butter is a hand-crafted fly line dressing made in the USA. Otter Butter applies easily with the included chamois applicator and an application should last through a long day on the water. Originally developed for oiled silk fly lines, Otter Butter can be used on pure silk and synthetic furled leaders and tenkara lines and even modern synthetic fly lines (it does not contain any harmful solvents or ingredients). Otter Butter does not contain silicones. Otter Butter has a mild and pleasant beeswax fragrance. This is the same famous Cutthroat Leader otter Butter that you have become use too, but in a smaller / lite-weight container. It comes packed in a plastic container and is a .25 oz. I have been pleasantly surprized at how well "Otter Butter" works. It takes approx. 2 1/2 minutes to apply properly to a CutThroat Thread Furled Leader. Once applied, the leader will float all day long. I have used/tested a lot of products, this product works extremely well. You will not be disappointed. Mike Morin, Owner of Cutthroat Leader Co. Instructions Never apply Otter Butter to a damp or wet silk line, trapped moisture invites mold. Apply to clean fly line with chamois pad at least 30 minutes in advance of fishing - this gives the butter time to set up properly. Make sure the butter gets down into the weave and remove excess. An application should last the entire day.