SERAFLEX® thread from Mettler is perfect for seams that need to stretch! It is made with 100% PTT, and allows the sewing thread to stretch up to 65%. Perfect for knits, stretch wovens, underwear, lingerie and it is chlorine resistant for swimwear. 

Instructions for use: SERAFLEX® should be used as both, needle and bobbin thread. Thread tension should only be “as tight as necessary”, meaning as loose as possible. The bobbin thread should also be wound with as little thread tension as possible to prevent the thread from stretching beforehand. Best for straight stitching. 

Certified: STANDARD 100 by OEKO-TEX®

Each spool is 130m (142yd)