These prevent skipped stitches on heavy fabrics.

Purple Tip Needles are designed to prevent skipped stitches with heavy fabrics, including knits, while doing sewing and embroidering. They feature a ball point tip to prevent fabric thread breakage and a special cobra shaped head to form a proper needle thread loop so that it prevents skipped stitches caused by the fluctuation of the fabric. And they're available in a heavier #14 size.

Purple Tip Needles are recommended for:

• Embroidery with a high density design and/or thick fabric
• Fluffier thread like cotton
• Quilting multiple layers which normally resist needle penetration      
• Sewing knit, tricot, and synthetic fabrics like thick polyester