PURE LINE Volume & Strength shampoo is intended for thin, weakened hair that can look limp or flat shortly after washing. Its role is to cleanse the scalp and roots while helping the hair remain soft, airy and visually more dense. This makes it a better fit for hair that needs freshness and movement rather than a rich, coated finish.
The formula is described as containing flax extract and wheat extract. Flax extract is valued for the light smoothing layer it can form on the hair surface, which may help strands feel neater and reflect light better. Wheat extract is commonly used in care for fragile-looking hair because it can improve the feel of the lengths and give a more substantial, better-groomed result.
It is most suitable if your main concern is flatness at the roots, quick loss of volume between washes, or hair that looks untidy even when clean. It may be less ideal if your hair is very dry, coarse or heavily processed and you rely on rich nourishing shampoos to make it feel manageable. In that case, you may still use a lighter shampoo at the roots, but apply conditioner or a treatment mainly to the mid-lengths and ends rather than weighing down the scalp area.