Cortland Full Sinking Type 6 Fly Line - Black 90ft WF8S Review (2026)

What makes this an 8 weight sinker

This line shares its construction with Cortland's Full Sinking Type 6 family: a weight forward taper on a braided nylon multifilament core, with the manufacturer stating a sink rate of 6 to 7 inches per second. The WF8S designation means this specific spool is built and weighted for an 8 weight rod, with Cortland listing a grain weight around 210 grains for that size, heavier than the 7 weight version in the same family. The extra mass helps load fast-action 8 weight rods quickly and turns over the larger, more wind-resistant streamer patterns typically fished on that rod weight, and the head and running line follow the same roughly 32 and 58 foot split used across the series.

Intended fishing applications

Cortland positions the Full Sinking Type 6 series for trout, salmon, steelhead, carp, bass, pike and panfish, and the 8 weight size in particular suits anglers targeting bigger fish or fishing larger streamer patterns that need a heavier line to cast effectively. It is built for deep stillwater tactics or heavy, deep-water river conditions where the goal is getting a fly down to fish holding well below the surface rather than working the top of the water column. The stated water temperature range for the line is 30 to 70 degrees Fahrenheit, and the line is priced in line with the rest of the Full Sinking Type 6 series.

Handling a heavier sinking line

An 8 weight fast-sinking line carries more mass in the air and in the water than lighter sinking lines, which means it takes more effort to lift off the water and recast repeatedly through a session, something anglers should expect compared with floating or lighter sinking setups. The 90 foot total length, built from roughly a 32 foot head and 58 feet of running line, needs adequate backing capacity on the reel since the whole line sinks rather than only a tip section. The black color keeps the line discreet in clear or deep water, and the braided core is meant to resist tangling on the retrieve.

Best suited water and limits

Because this is a specialized deep line rather than an all-purpose taper, it has no real application in shallow riffles, small streams or any water where fish are feeding near the surface; using it there mostly risks snagging bottom and losing flies. It earns its place as a dedicated tool for lake fishing from a boat or float tube, or for swinging streamers through deep river pools, situations where getting a fly down quickly and keeping it there matters more than delicate presentation. Anglers who split time between deep and shallow water should plan on carrying a second, lighter line or sink tip for those changing conditions.

How it stacks up

Within Cortland's own catalog, this 8 weight sits alongside the 7 weight WF7S version of the same Type 6 line and the shorter Streamer Sink Tip 10, which trades full-line sink for an easier-to-mend floating running section. Compared with competing full sinking lines from other manufacturers in a similar price bracket, including Scientific Anglers' Frequency Type VI, it scores comparably for build and sink performance, making it a reasonable pick specifically for anglers who already know they want a dedicated 8 weight sinking line rather than a lighter or sink-tip alternative for their heaviest streamer work.

Frequently asked questions