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Beware of fakes
The Castline sleeve is only available on this site. Copies imitate the tube, but never the serum formula.
“My lashes are straight and kept drooping. Now they stay up all day, without a lash curler.”
Sylvie M. ★★★★★
“No more marks under my eyes at the end of the day. And in the evening warm water is enough.”
Nathalie R. ★★★★★
“I can finally see even the tiny lashes in the outer corner. My eyes look open, not tired.”
Corinne B. ★★★★★The formula wraps each individual lash in a flexible sleeve instead of just painting it. Your lashes stay curled and separated, with no clumps.
Nothing sits loose on the surface, so nothing can flake under your eyes during the day.
Warm water, nothing more. The sleeves slide off on their own: no makeup remover, no rubbing along the lash line.
Just one light sleeve per lash, with a serum (Korean ginseng, hyaluronic acid, vitamin E, Swertia japonica) that stays on the lash while you wear it.
They're already talking about it – screenshots included
Women who were tired of their eyes looking tired.
“Nurse, twelve-hour shifts. I used to have marks under my eyes by 3 pm, and people asked if I'd slept badly. Now nothing moves: there's nothing on the lash that could fall off. And in the evening lukewarm water is enough.”
“My lashes are straight and heavy. Every morning I fought with my lash curler, only for everything to droop again ten minutes later. Here the sleeve builds around each lash and holds it up. My eyes look open without looking overdone.”
“I've always had full lashes, but over time they thinned out at the outer corners. Because the sleeve forms lash by lash, even the tiny ones stand out. My eye is redefined all the way to the corner, and that's exactly what makes the difference.”
“Sensitive eyes – I always read the ingredient lists before buying. What convinced me: no rubbing to remove it, everything slides off with lukewarm water, and the serum stays around the lash all day while I wear it.”
Tracked shipping – and our customer service is here for you before and after your purchase.
Removes with lukewarm water, no rubbing at all.
Nothing flakes under my eyes anymore
“At 5 pm I caught my reflection in the metro window and there wasn't a trace under my eyes. Nothing sits loose on top, so nothing slides down.”
My lashes stay up all on their own
“I have straight, heavy lashes and fought with my lash curler every morning. Here the sleeve keeps them curled and separated – and that's how they stay.”
Warm water – and done
“Taking off my makeup was what I dreaded most, my eyes were so irritated. Now I just use warm water, everything slides off, and I don't have to rub along my lash line.”
Removes with warm water, no makeup remover or cotton pad needed: try it with zero risk to your lashes.
Warm water, nothing else. The sleeve slides off the lash all on its own – no makeup remover, no cotton pad, no rubbing along your lash line. That's the whole evening routine.
The sleeve builds around each lash instead of just sitting on it, and that's what holds the lash up. No heavy layers of color, no daily battle with the lash curler.
Nothing sits loose on the surface: the color isn't applied onto the lash but sealed in a flexible sleeve around it. So there's nothing loose that could fall off or transfer.
Because the sleeve forms lash by lash, even the finest hairs in the corner of the eye get caught and become visible. You won't get new lashes – you'll finally see the ones you already have.
No, it's the same step. Korean ginseng, hyaluronic acid, vitamin E and Swertia japonica are already in the formula and stay on the lash for as long as you wear it.
The effect – curled and separated – is there the moment you apply it, not in six weeks. We can't give you measurements for the serum – and we won't make any up.
That's exactly the point: one light sleeve per lash, definition with no clumps and no weight, and it comes off with warm water alone. No rubbing needed.
The tube, sealed with its cap, nothing more. No box, no pouch, no extras – just the product.
Not a layer of color that just sits on top: but a sleeve that builds around the lash, and a serum that stays for as long as you wear it.
The flexible sleeve, lash by lash
It forms around each lash, one by one, and keeps it curled and separated. Nothing sits on top, so nothing falls under your eyes.
The peptide serum around the lash
Korean ginseng, hyaluronic acid, vitamin E and Swertia japonica stay wrapped around the lash while you wear it. Lukewarm water slides it all off – no rubbing at all.
Removes with lukewarm water only: no makeup remover, no cotton pad, no rubbing along the lash line.
From the very first coat your lashes stay curled and separated, and your eyes look more open – until evening, without anything sliding under your eyes. If you don't see that difference in the mirror, let us know and we'll refund your money.
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