Mirror Image from H2O is a modern tying material for big flies of all kinds.
I use this material my self for tying big Pollock flies.
One back cast sheds any water making the forward cast a lot easier.
You can tie flies / streamers of any length.
A bunch of vibrant colours along with some natural ones as well are available.
If your getting in to sea fly-fishing then this is a must have in your tying box.