The Blue Polar Tube is one of those patterns you just know will catch fish. Its got the wiggle, its got the right size, its got flash, its got everything most steelhead are looking for. The UV chenille adds just enough to pop to fish it in bright sun, and makes the overall darker coloration pop in low light.
I fish this fly any time of the year for steelhead, from the top to bottom of any system, and top to bottom of the water column. It works well for Chinook further up the river, and in cleaner water.