I use to use shock gum until the poly leaders entered the market and I strongly recomend it...I've used them for years and love them.
Characteristics are a mono core with a poly outer shell giving the angler a leader that has just the right amount of stretch for lighter tippets, loop to loop conections on each end, nice roll over.
Available in floating to various sink rates, of course the fast sinking (black) lead core option does not have the stretch the others do.
I carry hover intermediate and fast sinking in my pack all 5' legnths and add 2' - 4' legnths of tippet depending on the situation.
I've had them last 2 seasons or more.
[image]http://www.flylines.com/TemplateImages/Flylines/Body/Products08/SalmonSteelheadPolyleader_08.jpg[/image]
Available in seven densities in 5',10' and 14’ lengths to provide complete depth control, so often essential for salmon/steelhead fishing. Floating leaders work well when fishing Bombers, Slow and Fast sink leaders are perfect for avoiding drag with a floating line and the Extra Super Fast sinking leader gets the fly deep quickly.
Max. tippet 24lb–40lb available in 5’ ,10’ and 14’ lengths.