Machine Wefts are loose hair that is fed through a machine and sewn together, creating a track. At the root, hair is folded and sewn and then a reinforced stitch is applied for a stronger hold to the weft. Machine-tied wefts are usually thicker and a little bulkier than hand-tied wefts, but are sturdier and can handle many different types of installation methods. Machine wefts are available in more style and texture varieties. They are packaged as one long weft and designed to be cut with minimal shedding into the desired lengths needed for the install.