Semperfli Flat Fly Tying Foam - Semperfli Flat Foam is a lightweight closed cell foam that is perfect for bodies and floating flies like; Sedges, Ants and Detatched Daddies. The large array of colours and sizes make them the perfect addition to your tying arsenal. 6.5in x 3.7in Sheets 2.5mm, 3.5mm, 4.5mm Thickness available