I was picking up some supplies at the fly shop and they had a package of tan "Nymph Foam" in the half off bin. I picked it up (as well as several packs of CDC in different colors all for about $1 per pack). The foam is pretty soft and is pre-cut into strips about 3/16" wide.

I got home and started thinking "Nymph Foam"? Foam floats and nymphs sink. I could maybe tie some hoppers from it if it's closed cell foam and floats. But if it's open cell foam then it's essentially a sponge and will soak up water and sink.

So what kind of nymph pattern would I tie with nymph foam? I gotta know before my wife ask me why I'm buying materials at the fly shop that I don't even know how to use.