100% Polyester. White. Thermolam® Plus Sew-In is a lofty, needle-punched fleece for quilting, garments, crafts and home decorating. It is compatible with all fabrics including knits. Thermolam® Plus is stable and compact for easy cutting and as it has no grain, can be cut any direction. **Made with 100% Low Loft Acid-Free Polyester