- 2 hr2 hours
- 150 US dollars$150
How long does a sew-in last? If you're showing your sew-in love and taking proper care of it—more on that in a bit—it'll last up to six to eight weeks, says Angelina. If you try to keep it in longer than that, you're risking damage to your hair and scalp (aka irritation, excess oil buildup, and breakage).