Sisterlocks™ is a patented form of sectioning, starting, and maintaining microlocks developed in 1993 by Dr. JoAnne Cornwell. Sisterlocks are almost exclusively cultivated in kinky hair types, and a full head of Sisterlocks has 300+ sections when complete. The delicate, manually-formed knots in Sisterlocks are regularly maintained by a Sisterlock-certified technician who has undergone training in the patented technique. Therefore, there are no online tutorials to start or maintain Sisterlocks.