People with dry, brittle, coarse, or chemically treated (colored/heat-styled) hair who want an everyday moisturizing shampoo-and-conditioner routine. Not targeted at fine/oily hair types looking for volume. Consumer, at-home use — Redken is a professional salon brand but this set requires no stylist or special application.

The main advantage of buying the Duo rather than either product separately is that Redken designed All Soft Shampoo and Conditioner to function as a paired system, so the moisture and shine benefits compound when they're used back-to-back rather than mixed with an unrelated shampoo or conditioner. For someone whose hair is dry, brittle, or roughed up from color and heat styling, that means a simpler routine — one wash-day set built around argan oil and a moisture-focused complex, rather than having to separately shop for a compatible shampoo and conditioner.

• Apply All Soft Shampoo to wet hair, work into a lather, and rinse thoroughly
• Follow with All Soft Conditioner: distribute through mid-lengths and ends (avoiding the scalp/roots if hair is fine or prone to oiliness)
• Leave on briefly, then rinse thoroughly
• Use as your regular shampoo-and-conditioner routine for cumulative softness and shine benefits

Pros:

• Two full-size (10.1 fl oz) products in one set — a complete wash-and-condition routine, not a sample
• Shampoo and conditioner are designed to work together for a stated cumulative conditioning boost versus using either alone
• Argan oil-based formula targets dryness/brittleness specifically rather than being a generic all-purpose duo

Cons:

• Rich, moisture-focused conditioner may feel heavy or weigh down fine or oil-prone hair
• Formulated specifically for dry/damaged hair — not the right match for someone with normal or already-soft hair seeking volume
• Bundle locks you into two full-size items; no smaller/travel size offered within this specific duo