Weft hair extensions are tracks of hair secured together at the top, creating a curtain of flowing hair. These tracks come in multiple different widths and lengths, and can be dyed to match virtually any color. The cheaper extensions are typically made by machine, and the more expensive ones are made by hand. Options for attaching weft hair extensions range from the safer hand sewing and taping methods to the potentially damaging hot gluing and bonding methods.
Individual weft hair extensions come in different sizes to cater to the wearer's unique hair style. On average, widths of the tracks range anywhere from 1 to 5 inches. Lengths can be customized by using tracks slightly longer than the wearer's natural hair and cutting them to suit the style needed. Virtually any length of tracks can be ordered. Smaller-width tracks are often used as highlights or lowlights, and the wider tracks are used for the appearance of a fuller head of hair.
Different textures and styles can also be ordered. Options range from thin hair to coarse hair, and straight hair to curly hair. In addition, the hair can be dyed to match almost any color. Wearers can choose several different shades and use them simultaneously to create a multicolored effect.
Extensions made by hand are preferred over those made by machine. The weft hair extensions made by hand can be customized to fit perfectly on the wearer's head and also to blend naturally to match the wearer's hair color. Weft tracks made by machine may not fit or blend as well. The prices for the extensions also reflect their quality, with the tracks being made by hand costing quite a bit more than those made by machines.
Several methods exist for attaching weft hair extensions to the head. One non-damaging method of applying the extensions is to hand-sew the tracks on to the natural hair. Another safe method is to use liner tape that simply sticks to the natural hair and holds the track in place. Other methods include bonding and gluing the tracks to the head, but these methods can be damaging to the scalp and natural hair because they often involve using heat, which can burn the scalp and skin if not done correctly. Even when heat is not used, the materials can cause damage to the scalp and cause natural hairs to fall out.