Seraflock is a stretchy elasticated sewing thread ideal for sewing on elastic and knitted fabrics. This thread gives strong results and is ideal for sewing underwear, gymnastic, swimwear, sportswear and jerseys...practically any fabric which is stretchy. It is also suitable for decorative seams. It has unsurpassed and trouble free sewability, even on the most sophisticated overlock and sewing machines. Seraflock does not shrink, is easy to use and keeps its colour beautifully, even at high temperature washes. Stock ID 4237-1000