Reflective thread, 500 m, Nr.~40 (medium), KL4238 | Decorative & Fancy Knitting Yarns

The reflective threads are combined with a strong and slippery synthetic thread to ensure sewability and thread run in the embroidery machine. 

When sewing, use high-quality needles (Schmetz or Organ) 

Needle selection: No. 90-100. If necessary, useTop Stitch needles with an extended thread channel.

The thread only glows in the dark.