Weft hair extensions are a type of hair extension that is sewn into a weft, or a strip of fabric. Weft hair extensions can be made from real human hair or synthetic hair, and are available in a variety of colors and styles. Weft hair extensions are attached to the natural hair with clips, glue, or tape, and can be worn for several weeks at a time. Weft hair extensions are a great way to add length, volume, and style to your hair, and can be a fun and easy way to change your look.