This strike indicator has already been waterproofed so you donâ€™t have to apply any floatant. This ultra-light wool yarn is bio-degradable and floats like a cork. It is fully adjustable, reusable, easy to put on, and extremely visible on the water. There are 24 inches of material in each dispenser, enough for a yearâ€™s worth of fishing. When fishing in daylight, the bright colors are outstanding, but if fishing in dark shadows or twilight, black is the most visible. Our multi-colored indicators are great in all conditions. This indicator is very sensitive and can help improve the fly's presentation to the fish. The indicator forms a 'V' when tied on. This V can be used to tell where the fly is located. *If the V is straight up then the fly is in good position. *If the V is pointing upstream then the fly is downstream of the indicator and the line needs to be mended to correct this. *If the V is pointing downstream then the fly is dragging on the bottom and the indicator needs to moved closer to the fly. WATCH closely because you will be able to see even the softest strikes. Without a doubt, it is the best strike indicator on the market.