Clear-Quilt is a 100% mercerized cotton ready wound bobbin that is designed for quality quilting and piecing applications. Consists of Egyptian long-staple fiber which creates a high luster seam appearance. Washable and colorfast. Available in popular colors so you can spend more time quilting and not winding bobbins. Clear Plastic flange bobbin works great with thread sensors so the operator knows when the bobbin yarn is about ready to run out. Offers significantly more stitches or yards per bobbin than machine wound bobbins.