Gütermann Sulky Invisible is perfect for when you require strong and flexible thread that needs to be practically invisible. It is suitable for seams, for sewing on beads, sequins or buttons, for repairing holes and much more. Gütermann Sulky Invisible is made from 100% polyamide, and is washable up to 60°C. Recommended needle size is NM 75/80. Each spool holds 200 metres of thread.