Brush inside cap for easy application Odorless and non-toxic Great for dry flies, nymphs and emergers Powdered formula 1 oz bottle Double-Duty Fly Floatant - That's right, Frog's Fanny is not only the best dry fly you will ever use, now you can really "Match the Hatch" by coating your nymphs with Frog's Fanny. It will put an air bubble around them that looks exactly like and emerging insect. Try it, it really works!