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✦ FLEX — pure cysteamine lash lift solution
the best of both worlds. FLEX is a free-base cysteamine formula, which means the molecule isn’t attached to anything else. That lets it work quickly while still feeling gentle, almost like skincare, thanks to the added proteins. It’s thick and creamy right out of the sachet, and the scent is som
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26 ratings
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Had a hard time deciding on what brand to go through and decided to go with bko. No regrets at all! Used for a first time lash lift with no issues and I loved the extras!! Thank you!
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Madison · 11 days ago
Love bko lift system!! super gentle and easy to work with, and it doesn’t strip the hair from any moisture. Only use it for lashes, but yesterday I used it on my brows and I love it.
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Irianny · September 1, 2026
By far the best KLL system I’ve tried! Super gentle and beginner friendly! It’s so gentle that I feel it’s hard to over process lashes with this system! Love and always have it stocked in my suite 💗