It is fine and durable and a perfect match for the shiny Polyneon Green top threads.
100% polyester [filament; recycled]
Art no. 321
Polyneon Green Bobbin is a high-quality under-thread made from 100% recycled polyester. It is fine and durable and a perfect match for the shiny Polyneon Green top threads. It helps making a 100% rPES embroidery on workwear, denim, swimsuits, and other demanding textiles.
Guidelines for Underthread use: For standard length stitches the general rule for underthread requirement is around 3 m per 1000 stitches. Upper thread: You can expect approximately 5 m per 1000 stitches. Correct thread tension: A perfectly tensioned embroidery with standard length stitches should have around one third of the underthread visible on the stitches underneath!