Curly or straight: What determines hair shape?

Whether you are sporting curly locks or poker-straight hair is determined by the shape of your hair follicle and the behavior of a host of cells.

All the Natural Hair Types and Curl Patterns, Explained

How To Sleep With Curly Hair - 6 Best Techniques In 2019

安心の海外正規品 hair curl/ straight - 美容家電

What are the scientific differences between curly and straight hair? Is it due to keratin ratio, differences in chemical bonds (sulfide maybe) or nature of the hair follicle? - Quora

How to Style Curly Hair, According to a Pro

7 Ways to Determine Hair Type - wikiHow

Hair Type Chart: How to Determine Your Actual Hair Type

Hair Textures 101: Changes in Hair Texture

12 Hair Types from Straight to Coily and Their Unique Texture and Needs

How to tell what your hair type is, as in type 2, 3, 4, etc. - Quora