Estaz UV60 is an excellent and durable replacement or addition to hen hackle, sculpin, and even spey hackle on some patterns. It has a strong, slim line core which allows for significant tension while tying. UV60 is great for big streamers, articulated streamers, saltwater, salmon, steelhead, trout, bass, carp, warm water and poppers. It also can be a big body material for large flies. Use UV60 alone or as an accent to create new designs or a new flair to existing and traditional patterns. Fibers are 60mm (2.36") long, 30" per package.