This method of application is fast and allows the fly to be completely covered with a barrier that keeps moisture out. It works well on files tied with all types of materials and is especially effective to float large Stimulators and Hoppers tied with foam. Our field and lab tests show it to be the best performing floatant available and it is not flammable and it contains no organic solvents, 100% solids and is environmentally friendly.The floatant is delivered in a High Density Polyethylene (HDPE) bottle with a silicone seal in the Cap. This packaging assures that the container will not leak all over your vest and cause a mess. The Cap is attached to the Container with a leash to allow the fly fisher minimum distraction when applying floatants. The wide opening allows even your largest bugs to be dropped into the container. A full 67 grams of pure floatant is provided in a 2.5 oz. container, instead of the 1.0 oz. (about 20 grams) provided by most of our competitors.