Manucurist Duo Day & Night Nail Kit — 10% Keratin Strengthening Serum + Overnight S.O.S. Nail Mask for Soft or Damaged Nails

Manucurist Duo Day & Night is a two-step nail care set with a 10% keratin strengthening serum for daytime use and an overnight S.O.S. mask to hydrate and protect fragile nails.

This compact routine pairs an express-strengthening serum with an intensive overnight mask to help restore the look and resilience of soft or damaged nails. Formulated with plant-based keratin, exfoliating AHAs, biotin and silicones, the kit delivers targeted support during daytime wear and deep hydration while you sleep. Both products are made in France and designed to slot easily into a daily grooming ritual or a travel-ready beauty set.

How does the Keratin Booster help fragile nails during the day?

The Keratin Booster is a lightweight nail serum concentrated with 10% keratin to reinforce the nail plate and reduce breakage. It contains gentle exfoliants to smooth the surface and ingredients like biotin and silicon to support apparent hardness and resilience.

• 10% plant-based keratin to strengthen and fortify nails
• AHA & gluconolactone for mild exfoliation and smoother nail texture
• Biotin and silicon to help reduce splitting and improve durability
• Brush applicator for quick, precise daytime application

What does the S.O.S. Nail Mask do overnight?

The S.O.S. Nail Mask is an intensive, peel-or-wash overnight treatment that forms a protective film to deliver concentrated hydration and repair while you sleep. Applied in a thick layer several nights per week, it helps restore moisture and visibly improve nail condition by morning.

• Thick, film-forming texture for sustained hydration overnight
• Designed to be peeled off or washed away the next morning
• Targets very damaged or dehydrated nails for noticeable improvement
• Use 2–3 nights weekly as part of a restorative routine

How do I use the day-and-night routine for best results?

Apply the Keratin Booster to clean, bare nails one to three times daily and allow it to fully absorb. For night care, spread a thick layer of the S.O.S. Mask on bare nails two to three nights a week and remove in the morning.

• Day: Brush serum onto nails, let dry; reapply as needed during the day
• Night: Apply mask in a thicker coat, let dry, remove next day by peeling or washing
• Complement with daily cuticle nourishment for better overall results
• Consistent use for two weeks showed improvements in clinical panels

Is the kit safe and what makes it plant-based?

Formulated without compromising on performance, the Duo centers on plant-derived keratin and carefully selected actives suitable for routine cosmetic nail care. The products are produced in France to Manucurist standards and fit into a vegan-friendly approach to manicure maintenance.

• Plant-based keratin provides strengthening without animal-derived ingredients
• Vegan-friendly formulations aligned with Manucurist’s clean beauty mission
• Manufactured in France under quality controls
• Designed for topical cosmetic nail care, not medical treatment

Who is this for? The Manucurist Duo Day & Night kit is aimed at anyone with soft, thin, or damaged-looking nails who wants a simple, non-invasive daily and weekly routine. It suits people seeking visibly stronger nails without salon treatments, those who travel and need compact care, and gift shoppers looking for a thoughtful nail-care present for friends or family.