✦ 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
4.9
32 ratings
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This system was super easy to use. No need to mix in any powders, it’s the perfect thickness. No harsh smells. My clients loved the results and that it’s faster than systems I have used before. Will be purchasing again.
K
Kanoelani · October 27, 2026
I absolutely love the flex formula. It’s gentle but works super quick and I love the consistency. I don’t even need to add thickening powder.
D
Dana · October 23, 2026
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!