Yak is a great material to use on big streamer flies. First of all, you get a length from yak that isn’t easily matched. The Hairline Saltwater Yak comes in a 12″ length and is similar in translucence to polar bear hair. The only real downfall is that you do not get a natural tapered tip on the hair, but this is similar to what you find with synthetics. This material works great for long wings on baitfish patterns, feelers for shrimp or tails.