This shampoo is meant for people with dry, porous hair — hair whose outer cuticle is raised or damaged (from heat styling, coloring, or environmental exposure) and loses moisture easily. It's a consumer retail product suitable for all hair lengths and marketed to both men and women, intended for regular use as the cleansing step of a moisturizing routine rather than as an occasional treatment. It's not targeted at fine or oily hair types, where a lightweight or clarifying shampoo would generally be more appropriate.

The specific mechanism here is the micro-oil particles suspended directly in the shampoo base, which is a different approach from moisturizing shampoos that rely mainly on humectants or heavier conditioning agents — the oil is doing cleansing and conditioning work simultaneously rather than in separate steps. That's also why Matrix targets it at porous hair specifically: porous, moisture-deprived strands lose hydration fastest, so addressing it at the cleansing step (rather than only with a leave-in or oil applied afterward) is the differentiator.

Apply to wet hair, massage into a lather, and rinse thoroughly. Follow with Biolage Advanced Oil Renew Conditioner for the full moisturizing system.

Pros:

• Micro-oil particles are built into the cleansing step itself, rather than requiring a separate oil treatment applied after shampooing
• Silicone-free, so it won't leave the buildup some silicone-heavy moisturizing shampoos can cause over time
• Formulated specifically to reduce hair porosity and softness after one use, addressing a named hair concern rather than generic hydration marketing

Cons:

• Still built on a sulfate cleansing base (Sodium Laureth Sulfate), so it is not a sulfate-free option
• Contains fragrance allergens (hexyl cinnamal, coumarin, benzyl alcohol, linalool) worth noting for sensitive scalps
• Best used as part of the full two-step Oil Renew system — using it without the matching conditioner may not deliver the full moisture-retention result the line is designed around