Micro loop hair extensions, also known as micro ring or micro bead extensions, are a type of hair extension that doesn't require glue, heat, or chemicals for attachment. They consist of small, individual strands of hair with tiny loops at one end. These extensions are applied by threading a small section of your natural hair through the loop and then clamping the loop with a special tool to secure the extension in place. This method offers a semi-permanent way to add length and volume to your hair.