Just got the samples from Frog Hair on those, and I'm impressed so far. They should change the name to just "Nymph Leader", because they will be equally applicable to trout as they are to Great Lakes Steelhead. The super-long tippet will help sink nymphs quickly & deeply, and to drift more naturally. It's cool to see products that are long overdue finally appear on the market. Frog Hair & Rio are both really great companies, and a pleasure to deal with on the retailer end.