When I was introduced to the Triangle Taper Nymph line in about 2011 getting hold of them in this country wasn't easy and in desperation I phoned Royal Wulff and had a couple sent from the States.
It was well worth the hassle as they are a stunning line to use. The head section is heavy and with the help of the superslick J3 coating the line zings through the guides to sit memory free high on the water. The line is a bright, but not fluorescent, yellow and easily seen on a dull day.
I bought these to use, primarily, when spey casting a single handed rod, and it fits the bill perfectly. I've tried several lines but the TTNF (Triangle Taper Nymph Floating) is the best line I've found for this application. Now this is a heavy line with a short head and the weight and its distribution is ideal for roll casts and spey casts. However when overhead casting there is a need to compensate accordingly. Be aware of the head weight and short rear taper or else you could find the line dropping too low in the back cast . This lines can be found more easily in the UK now and are finding a devoted following. I've had my original lines for over 6 years, I still use them regularly and they have stood up well to some rough handling . I really like these lines and recommend them.