There is a layer in this hair. At the longest, it is 21″, but the shorter layer is right around 15″
I do not smoke, and am very healthy. Everyone comments on how shiny and healthy my hair is. I take flax-seed oil, and biotin. I do NOT use ponytail holders. I use a plastic grab clip to keep my hair in a bun to minimize end damage. I wash with shampoo about 1x/month, and condition on a bi-weekly basis with Pantene Pro-V. I do NOT blow-dry, curl or straighten my hair.
I am 27 years old, but have found no gray hairs. The color is generally medium brown with a few natural blonde strands. My hair is soft and on the finer side, but it is pretty easy to work with.