Gigiliscious tape-in hair extensions are individual wefts of hair that are applied to your natural hair with high-grade adhesive tape. They stay incredibly secure for at least 6-8 weeks. Tape-ins are reusable, and each pack holds 20 wefts. Generally for a full head you can count on 3-7 packs of hair depending on how thick your hair is. Hair is reusable! No shedding, or tangling.