Mixed cottonNot 100% COTTON, these black threads are made of high-quality durable Mixed cotton, it will not be fraying and breaking easily, and the plastic reel also is not easy to deformation. This high-quality thread help you sewing efficiently. Widely UsedFits many sewing machines brand. And it can be used for a variety of sewing projects. This cotton thread could fullfill most of your home use project. Best ValueCome with 5 pcs black thread spools, and each thread is about 1000 yards. And these regular colors meet most of home use sewing projects' needs. These beautiful vibrant colors are ideal for adding your creations to your sewing project. You can add embroidery details to homemade dresses, blouses, blankets, and more. Nice GiftAs a good gift, it is perfect for your friends and family. With these sewing threads, it easy to complete your DIY sewing. For Your Dedicated Service provides 100% satisfactory service: Replacement and return within 30 days. Confidence comes from high quality and our constant pursuit of perfection. We believe that you will like our sewing thread set, but If for some reason you are not satisfied, please let us know, we will help you solve it within 24 hours and make you satisfied.