how many wefts for a full head?
How many hair extensions you need for a full head depends on several factors, but generally you can count on 4 to 10 packs of hair for I-Link and Kera-Link or 3 to 7 packs for Tape-In. (I-Link and Kera-Link packs come with 20 strands per pack; Tape-In packs include 10 wefts per pack.