
Description
Our mega-thickening treatment helps build texture for a long-lasting, voluminous effect. It fortifies hair without weight, delivering instantaneous, visible results in minutes.
Visible results after one application*:
- Increased thickness + volume: fiber diameter +1%
- Reduced split ends + flyaway’s through 10 washes
*Clinical tests conducted on chemically treated hair, exposed to extreme damaging conditions of bleaching, washing, blow-drying and flat ironing.
Shipping & Returns
- Standard free shipping on orders over $99
- Standard and express shipping options available at checkout
- Standard shipping time is between 1–5 business days
- Pause, change or cancel your subscription after your first renewal
- Returns of unopened and unused products accepted up to 30 days
- See terms & conditions for more information
Ingredients
How to Use
Dallas Biotin Thickening Treatment
- Spend $100+ get $10 off - CODE: SAVE10
- Spend $200+ get $30 off - CODE: SAVE30
- Spend $300+ get $50 off - CODE: SAVE50
- Spend $400+ get $80 off - CODE: SAVE80
*EXCLUSIONS: Augustinus Bader, Biologique Recherche, Biophora, Davincia, Davines, Dr. Barbara Sturm, Eminence, Esthederm, Gelcare, iS Clinical, Laboratoires Dr. Renaud, May Lindstrom Skin, Moroccan Oil, Obagi, Olaplex, PCA Skin, Proderm, Skinceuticals, SkinBetter Science, TiZO, Valmont, Holiday Kits & Sets, Glow FIX Boxes, Bundles and products in the Liquidation category.
Free Samples

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