YLM1991 White Iron-On Non-Woven Fusible Interfacing is made up of 100% polyester. One Sided fusible interfacing can be easily fused with a hot Iron. Iron-on interfacing is also perfect for protecting and strengthening fabric stitching and providing structure for collars and facings. [ironing temperature]: 125-145 ° C [pressure ]1.5-2.5kg/cm2 [ironing time]: 10-14 seconds [usage]: first overlap the side with glue with the back of the fabric, then adjust the iron to the appropriate temperature and press the lining cloth to make the glue on the lining cloth melt and stick tightly to the back of the fabric. Be careful not to let steam out of the iron when bonding the lining cloth