Quality fly tying foam with high density, closed cells have been a staple product in the Semperfli fly tying materials range for many years. Semperli uses top quality plastazote foam with nitrogen bubbles which float high and are easy to tie with. Semperfli's range includes single color foam sheets, foam blocks and this Double Decker Foam in in multiple thicknesses and colors. Don’t confuse this with craft foam, it is top quality, high floating, closed cell foam. Each sheet is 165mm x 90mm.