This Julie Training head from Sibel comes with natural hair which is between 20-23 inches in length. The hair is 100% natural and in a dark blonde shade. Maximum density: 260-290 hair per square cm. All Sibel hair has been chemically bathed and disinfected to ensure optimum safeguards. Training heads are also available in varying hair thicknesses; Fine, Medium, Super, Maxi, and Extra Maxi Density. Student hair stylists can therefore practice their techniques on various hair types.