Plump + Juicy Lip Booster Buttery Treatment

Kosas Plump + Juicy Lip Booster Buttery Treatment is a lip treatment with a rich, butter-like texture built around concentrated fatty acids and plumping actives. It sits somewhere between a balm, a gloss and a treatment — hydration that also works on how full and smooth your lips look.

What it actually does

• Softens and deeply hydrates. Concentrated fatty acids soothe dry, flaky lips and help visibly repair dryness.
• Plumps without the sting. Kosas uses Plump Oleactif and plumping botanicals instead of tingling irritants — the brand says the formula packs seven times more lip-boosting actives, including hyaluronic acid and peptides.
• Smooths the look of fine lip lines. Peptides in the formula visibly firm and smooth.
• Comfortable to wear. The buttery texture is designed to feel cushiony, never sticky or greasy.
• Backed by the brand's own testing. In a Kosas consumer study of 33 women after overnight use, 94% agreed their lips felt more moisturised, smoother and less flaky, and 82% agreed their lips looked plumper. Self-reported results — individual results vary.
• Clean credentials: vegan, gluten-free, cruelty-free, recyclable packaging, per the brand.

How to use

1. Smooth it over lips whenever they need softness and a fuller look — it also works well overnight.
2. If you're wearing lip colour on top, let the booster absorb fully first, then apply your lipstick or gloss.

Questions

Does it tingle or burn like other plumpers?

No — this is the point of it. It relies on fatty acids, hyaluronic acid, peptides and plumping botanicals rather than irritating "stinging" agents, so you get the fuller, cushioned look without the burn.

Is it sticky like a gloss?

It has a buttery, cushiony texture that Kosas describes as never sticky or greasy — closer to a rich treatment balm with shine than a tacky gloss.

Can I wear it under lipstick?

Yes — just wait until it has fully absorbed before applying your lip colour so the pigment doesn't slide.

How long does delivery take?

Delivery takes 3 to 21 working days, depending on availability. In-stock items arrive at the shorter end; items we order in for you take longer.

Payment and returns?

We accept credit card, debit card, Instapay and mobile wallets — no cash on delivery. Returns are for defective, damaged or expired items only, reported within 1 day of delivery, with a refund to the original payment method within 15–30 days.