Great looking flies when using hair depends on the hair tips being aligned. Not only does this make flies look better, it can be the difference in a well-balanced fly too. Dry fly tails and wings need to be proportional and even to sit on the water properly. Using a quality hair stacker makes this operation a breeze. The Loon Zippy Hair Stacker is a one-piece, easy to use stacker that employs a window that allows you to see that the tips are properly aligned. Magnets help to keep the stacker closed while using it to keep mistakes at a minimum. Available in 3 sizes, small, medium and large.