Using polyester, this thread set is safe for all ages, ideal for parent child activities, school art classes, and beginner friendly crafting supplies The smooth polyester threads maintain natural styles and colorfastness, adding professional to your art and enhancing detail visibility in craft projects This 24 color polyester embroidery thread set vibranting rainbow selection for creative needs like crosses stitching, and garment embellishment with rich color addition Craft of polyester materials, these threads feature wear resistance and tensile strength, outperforming traditional cotton threads for long time durability in frequent use Individually packaged color tangling and simplify storage organization, making these threads for home studios and small craft workshops management