Razor Fly Foam from Wapsi Fly Tying is a super thin fly tying foam that works great on small flies and can be used on floating nymphs, wrapped as a foam body or for a foam fly tying material for wings on no-hackle dry fly patterns. It's a great foam tying material for small terrestrial flies too. Each pack comes with 2 pieces each of .5mm and 1mm foam. Opaque and translucent foam colors are available. Wapsi Razor Fly Foam can be used with Zap Foam Safe Glue to form multi-colored foam bodies too.