R+Co Dallas Biotin Thickening Shampoo & Conditioner Set — 2 x 8.5 oz, Volumizing Sulfate-Free Duo

R+Co Dallas Biotin Thickening Shampoo and Conditioner Set is a sulfate-free, vegan duo designed to add immediate body, strength, and weightless fullness to fine or thinning hair.

This two-piece set combines a biotin-enriched shampoo and a lightweight conditioner formulated to lift hair at the roots, fortify strands, and leave hair feeling soft without heaviness. Both formulas are free of sulfates and parabens, cruelty-free and vegan, and scented with R+Co’s signature “Dark Waves” blend — a warm, sophisticated mix of cardamom, pineapple, tangerine, and lavender. The set includes two 8.5 oz bottles plus a sample, giving you multiple washes to evaluate the thickening benefits and scent profile.

How does the Dallas duo create more volume for flat hair?

The shampoo gently cleanses the scalp and hair while biotin works to strengthen strands, creating a fuller appearance from root to tip. The conditioner is formulated to hydrate without weighing hair down, so lift and movement are preserved after styling.

• Biotin-enriched shampoo for higher visible body and improved strand resilience.
• Weightless conditioner that detangles and softens without flattening.
• Use-day results: noticeable lift and manageability after the first washes.

Will this set work on color-treated or delicate hair?

Yes — the formulas are free of sulfates and parabens, which makes them gentler on color and chemically treated hair compared with harsh surfactants. The lightweight conditioning helps preserve color vibrancy while improving texture and combability.

• Sulfate-free cleansing that reduces stripping of color and oils.
• Vegan ingredients and mild conditioning agents safe for treated hair.
• Suitable as part of a regular maintenance routine for colored or delicate strands.

How should I use the shampoo and conditioner for maximum lift?

Begin by massaging the shampoo into the scalp to remove buildup and stimulate the roots, then rinse thoroughly. Apply conditioner mainly to mid-lengths and ends, leave on for about two minutes, then rinse; focus on avoiding heavy application at the roots to retain volume.

• Massage shampoo into wet scalp, rinse completely.
• Apply conditioner from mid-lengths to ends and leave 2 minutes.
• Rinse and style while hair is damp to preserve body and bounce.

What does "Dark Waves" scent smell like and how strong is it?

"Dark Waves" is a warm, sophisticated fragrance that layers spicy cardamom over fruity pineapple and tangerine, balanced with a soft lavender finish. The scent is noticeable but not overpowering, formulated to linger subtly on hair after drying.

• Top notes: pineapple and tangerine for brightness.
• Heart notes: spicy cardamom adds warmth and complexity.
• Base: lavender provides a soft, calming finish that complements styling products.

Who is this for: This R+Co Dallas Biotin Thickening Shampoo and Conditioner Set is aimed at people with fine, limp, or thinning hair who want instant visible body and improved strand resilience without heavy conditioning. It’s a practical choice for color-treated or chemically processed hair, for shoppers wanting cruelty-free and vegan formulations, and for anyone who prefers sulfate-free cleansing with a refined, modern scent.