People with fine, flat, or limp hair, natural or color-treated, who want more root lift and body from their everyday shampoo and don't need or want a sulfate-free formula. It's a retail-through-salon consumer product: typically bought at a salon or professional beauty retailer, but used at home, no stylist required. It's not the right pick for someone who specifically avoids sulfates, or for very dry, coarse, or thick hair that needs a heavier moisturizing shampoo, since this one is built to cleanse thoroughly and stay lightweight rather than to deeply condition.

What sets it apart from a gentler, sulfate-free volumizing shampoo is that it leans into a stronger surfactant blend specifically to clear the buildup that weighs fine hair down at the root, trading some gentleness for a cleaner, lighter result, the trade-off Sebastian built the whole Volupt system around.

Apply to wet hair and massage into a lather, focusing on the scalp and roots. Rinse thoroughly, then follow with Volupt conditioner.

Pros: the sulfate blend cleanses thoroughly enough to strip the product buildup and excess oil that often flattens fine hair at the roots; it's formulated to be used on color-treated hair without a stated color-safe restriction; and it's designed as part of a matched system with the Volupt conditioner rather than a standalone product.

Cons: three sulfate-type surfactants make this a firmly non-sulfate-free shampoo, so it can be more drying than gentler volumizers for people with sensitive or very dry scalps; sulfates can accelerate color fade over repeated washes compared to a sulfate-free color-care shampoo; and it's a cleansing product only, it won't deliver a full volumizing effect without following up with the matching conditioner.