It is a great substitute for any pattern tied with bucktail. It is most durable and will last longer than natural materials. Slinky fibre is water resistant and makes casting bigger flies a breeze. This is an essential part of any saltwater fly-tying kit. Perfect for toothy fish. Also great for pikeflies and more. You can make your own H2O SF Blend with Slinky Fibres and the H2O Shiner or EP Sparkle.