The authentic grain of this comb is created through careful grinding and polishing of the natural bone material, highlighting its unique structure. To maintain its flexibility over time and prevent drying out or becoming brittle, the bone comb should be occasionally treated with natural oils, such as camellia oil or a neutral vegetable oil. Because the material is structurally similar to human hair, it also absorbs the scalp's natural sebum during combing, contributing to natural hair care.