SEA 201 Thundercloud Our Seagrass fiber is comprised of 100% cotton. 14 yards per bag. It is best described as a flat, woven tape like fiber. One ply. Seagrass is quite beautiful in both needlepoint, wool applique, and embellishment. This fiber looks different than many other fibers on the market so let your creativity guide you! Please note that the color of the fiber you are order is representative of what you see on your screen but dye lots, resolutions, and monitors do vary.