Veevus Holographic Tinsel. We use this stuff all the time. It's super strong, won't lose color when it's stretched and adds some serious flash to your fly patterns. It's great for bodies as well as wing cases and backs.
Thin Skin is a .004″ thick, stretchable and transparent sheet material that has a matte finish on one side and a shiny finish on the other. It is backed with a paper backing which makes it easy to cut into strips of all sizes. When the paper is removed, the transparent sheet can easily be tied onto the fly.The printed patterns on our Thin Skin can create an extremely realistic and/or dramatic look to the fly. Because Thin Skin stretches and compresses when thread or wire is wrapped around it, it is an ideal material to use for shellbacks on flies such as scuds or sowbugs or for wing cases on nymphs of all types. Many bass and saltwater fly tyers often use it to tie segmented crayfish and shrimp patterns.
Fluorescing Loon UV Clear Fly Finish. Similar to Flow but some sweet fluorescing action to boot. Very thin UV resin that can easily, and tack-free, coat heads, casings and bodies on flies. It goes on as thin as head cement and cures with no tack and has a very hard and shiny surface. 1/2 oz bottle.