haartypes

Haartypes, or hair types, are categories used to describe the natural texture and structure of human hair. They commonly refer to curl pattern, thickness, and overall fiber characteristics, and are used to guide grooming, product selection, and styling techniques. Hair type is influenced by genetics and hormones and can affect how hair responds to moisture, heat, and chemical treatments.

One widely recognized framework is the Andre Walker hair typing system, which groups hair into Type 1 (straight), Type 2 (wavy), Type 3 (curly), and Type 4 (coily or kinky). Subtypes labeled a, b, and c indicate increasing curl tightness or texture (for example, 2A, 2B, 2C). Other approaches emphasize measurable properties such as porosity (moisture absorption), density (hair number per area), and diameter, rather than rigid categories.

In practice, Type 1 hair tends to be smooth and reflects light, Type 2 forms loose to defined waves, Type 3 tends to curl with varying shrinkage, and Type 4 forms tight coils and can be very dry without proper moisture. Real hair often spans a range of patterns and may shift with humidity, processing, or health status.

Limitations: classification schemes are simplifications and do not capture all variation in texture, porosity, elasticity, or color. They should be used as guides rather than strict rules. For many people, customizing a routine based on porosity, elasticity, and scalp health yields better results.