Our BoB Units are 150 Density 100% HUMAN HAIR. THE HIGHEST QUALITY HUMAN HAIR ON MARKET. ALL BOB UNITS comes with combs ,adjustable straps and OUR CUSTOM BAND THAT gives extra support, allowing you to wear your unit AT EASE. The knots are LIGHTLY BLEACHED to a SAFE level and The Most Natural Hairline. OUR MINK HAIR IS DONATED FROM YOUNG FEMALE DONORS, WHICH MAKES THE HAIR STRONG & HEALTHY. DOUBLE MACHINE WEFT TO PREVENT SHEDDING. CUTICLE ALIGN TO PREVENT TANGLES. VERY SOFT. ALL OF OUR BOB UNITS CAN BE CURLED,STRAIGHTENED OR DYED . HAIR WILL LAST 2 YEARS OR MORE IF CARED FOR PROPERLY. WEAR THIS UNIT WITH OR WITHOUT ADHESIVE.