By One Sii Smooth Repair Essence – Salon-Quality Hair Serum- 290g

Bring the luxury of professional salon care into your home with By One Sii Smooth Repair Essence, a multi-functional hair serum designed to hydrate, repair, and protect your hair from the inside out. Formulated with 13 amino acids, hydrolyzed hyaluronic acid, and 42 botanical extracts, this treatment deeply nourishes dry, damaged, and stressed hair for a smooth, glossy, and healthy finish.

This all-in-one serum functions as a treatment, hair booster, scalp care lotion, conditioner, and hair mask—perfect for busy routines or anyone wanting silky, salon-grade results effortlessly.
Its lightweight formula absorbs quickly, leaving no stickiness while restoring softness from root to tip.

Key Features

• Salon-quality formula designed for professional-level care at home
• 13 amino acids to strengthen and repair damaged fibers
• Hydrolyzed hyaluronic acid for deep moisture retention
• 42 botanical ingredients to calm the scalp and improve hair health
• Targets reactive oxygen, helping protect hair and scalp from environmental stress
• Works as a serum, treatment, conditioner, mask, and scalp care in one
• Smooth, fresh fragrance that feels relaxing and luxurious

Perfect For

• Dry, damaged, frizzy, or chemically treated hair
• Scalp dryness or sensitivity
• Anyone wanting lightweight but effective moisture
• Daily hair repair and maintenance

How to Use: After shampooing, gently towel-dry your hair. Pump an appropriate amount (1–2 pumps for short hair, 2–3 pumps for long hair). Apply evenly through the mid-lengths and ends, then work any remaining product toward the roots. Leave in—no rinse needed. Style as usual. For extra damage care, use a small amount on dry hair as a finishing serum.