100% HUMAN HAIR, GREAT QUALITY, CAN BE WORN STRAIGHT, OR CURLED. THIS HAIR CAN BE DYED DARKER COLORS ONLY (BLACK OR DARK BROWN) ** DO NOT BLEACH OR LIFT TO LIGHTER COLOR. EACH BUNDLE IS 3.5 TO 4 OZ AND AVAILABLE IN A NATURAL 1B-2. WITH PROPER CARE OUR GLAM COLLECITION HAIR CAN EXPECT TO LAST 3 TO 6 MONTHS