Royal Envy hair extensions are 100% remy human hair! Courtney is a bright blonde color.  Each package of tape ins come with 10 pieces, in 16, 20, 22, & 24 inches in length. One piece is 2.5 grams, making one full pack 25 grams of beautiful hair! We recommend 4-6 packs for a full set. With the proper care, these extensions will last 6-8 months. **All hair sales are final**