Number 4 Hydrating Shampoo — Moisturizing, Color-Safe 8.5 oz | Sulfate-Free Hydration & Scalp Relief

Number 4 Hydrating Shampoo is a moisturizing, sulfate-free shampoo formulated to hydrate dry hair, protect color, and soothe sensitive scalps for soft, shiny results.

Whether your hair is brittle from styling, dull from environmental exposure, or color-treated and in need of gentle care, this shampoo is designed to restore moisture and manageability without stripping pigments. The formula cleanses while delivering hydration and scalp comfort, making it a versatile choice for everyday use or as part of a travel-friendly regimen. Free of sulfates and formulated to minimize buildup, it suits those who want a balanced, modern approach to cleansing and conditioning.

How does this shampoo restore softness and shine?

The Hydrating Shampoo delivers lightweight moisture to each strand, improving flexibility and surface smoothness so hair looks and feels healthier. It focuses on nourishing brittle, lackluster hair from root to tip without leaving greasy residue.

• Moisture-rich ingredients that replenish dry fibers
• Light conditioning agents for slip during detangling
• Non-greasy finish that enhances natural shine
• Formulated to reduce frizz and improve manageability

Will it protect my color-treated hair?

This shampoo is color-safe and gentle enough to help extend the life of salon color by avoiding harsh sulfates and aggressive cleansing agents. Regular use helps maintain vibrancy while still delivering a thorough cleanse.

• Sulfate-free base to limit color fading
• Gentle surfactants that remove dirt without stripping pigments
• Preserves tone and shine for treated hair
• Pairs well with color-preserving conditioners and treatments

Can it help with a dry or flaky scalp?

The formula soothes and hydrates the scalp to reduce feelings of tightness and dryness, without leaving buildup. It’s formulated to be comfortable for sensitive scalps and to refresh the skin at the hairline.

• Hydrating actives to relieve dryness
• Non-irritating ingredients suitable for sensitive skin
• Rinses cleanly to avoid residue and itchiness
• Safe for routine use to maintain scalp comfort

Is this a travel-friendly option and what sizes are available?

The product is offered in salon-size bottles and a compact travel format, so you can choose what best suits your routine. The travel-friendly bottle is convenient for packing, while the larger bottle supports regular at-home use.

• Main retail size for daily home care (as labeled)
• Compact travel bottle ideal for carry-on or gym bags
• Stable formula that travels well without leaking or separating
• Pairs easily with matching conditioners and treatments for a complete set

Who is this for? Number 4 Hydrating Shampoo is best for anyone with dry, dull, or color-treated hair who wants a gentle, sulfate-free cleanser that focuses on hydration and scalp comfort. It suits people seeking a modern, fragrance-balanced shampoo that supports color longevity and makes hair easier to style. If you need a moisturized, manageable finish without heavy residue—and prefer products safe for sensitive scalps—this shampoo is a practical addition to your haircare routine.