Human Hair quality: is human hair often mixed with premium quality heat resistant fiber. Recently some manufacturers have resorted to mixing human hair with heat resistant hair, because the features of the hair do not change significantly and makes the product more affordable to customers. This has been also a result of the price of raw human hair rising up for the last 2 years. Customers should beware when purchasing this human hair quality product because even though it can be curled and straightened, it cannot be died/colored. Also be cautious of not overpaying for human hair quality products as they should be comparatively cheaper than 100% human hair products.