What Are the Most Common Defects in Knitted Fabrics? Types, Causes and Inspection Methods Knitted fabric defects are irregularities in fabric structure or surface appearance that can affect product quality, production efficiency, and customer satisfaction. Common defects include holes, dropped stitches, broken yarns, needle lines, barre, oil stains, slubs, and spirality. They can result from yarn quality issues, knitting machine conditions, improper yarn feeding, or subsequent processing. For textile manufacturers, identifying these defects early is essential for maintaining consistent fabric quality. Combining proper production management with automated AI fabric inspection can help improve defect detection and quality control.