GBB Hidden Tapes are made of 100% Cuticle Remy Human hair, wich means THE BEST HUMAN HAIR. Hand-tied Seamless Tape-On hair extensions. They provide a natural look that is 100% invisible. These HIGH QUALITY hair extensions are LONGER-LASTING and RE-USABLE numerous times. They provide length and volume, and are easily installed. 100% invisibility-Guaranteed – Each package contains 4 pieces. – Around 10 packs are necessary for a full head.