The lightest flat lash extension — a split-tip ellipse base that delivers a darker, more defined lash line than round 0.15mm classics at a fraction of the weight. Ideal for fine, weak, or sensitive natural lashes that need definition without stress. Why You'll Love It Darker than round classics at lighter weight — the flat ellipse base creates more adhesive contact, so 0.10mm flat bonds stronger and looks darker than 0.15mm round at less weight Better retention for oily skin — more adhesive surface area means the bond is less likely to break down from oils or active lifestyles Split-tip finish — the natural split tip mimics real lash texture for a more natural, dimensional look Cashmere PBT fiber — ultra-soft, featherlight on natural lashes for all-day comfort Key Features Flat ellipse base with split tip 0.10mm thickness — lightest flat lash extension option Cashmere PBT fiber, deep matte black Available in 3 curls: C, CC, D 8–15mm mix tray FDA & CE certified — safe for professional salon use Cruelty-free, vegan materials Duty-free shipping to US & EU Best For Clients with fine, weak, or damaged natural lashes Clients with oily skin or poor lash retention history Clients wanting more definition than round 0.12–0.15mm classics without volume fans Hybrid sets using flat lash extensions as accent lashes for definition First-time lash extension clients wanting a natural but defined look Specifications Base Shape Flat ellipse with split tip Thickness 0.10mm Material Cashmere PBT Fiber, Deep Matte Black Available Curls C, CC, D Available Lengths 8–15mm mix tray Certifications FDA & CE Certified, Cruelty-Free Compare Options — Flat Lash Thickness Guide Thickness Effect Best For 0.10mm Flat — You are here Defined, ultra-light Fine or weak lashes, oily skin 0.15mm Flat Classic volume — most popular Most clients, everyday wear 0.20mm Flat Bold, dramatic Strong lashes, special occasions How To Use Prep — Cleanse natural lashes with Eyelash Primer to remove oils and improve adhesion Isolate — Use precision tweezers to isolate one natural lash Pick up — Grip the flat lash ensuring the flat ellipse base faces down toward the natural lash Dip — Dip the base into 0.5s Lash Glue — use minimal adhesive; the flat base bonds with less glue than round lashes Apply — Place 0.5–1mm from the lash line and hold for 2–3 seconds Hybrid sets — Place flat lashes as accent lashes for definition and add Easy Fanning 0.07mm fans for texture Related Guides Flat Lashes vs Classic Lashes: Which Should You Use? Lash Retention Guide: Why Extensions Fall Out and How to Fix It Humidity Guide for Lash Glue: How to Control Your Environment for Maximum Retention Complete Your Flat Lash Kit 0.5s Lash Glue — Fast bond for flat lash application Eyelash Primer — Prep for 30–50% longer retention Flat Lash 0.15mm — Step up for everyday classic volume Easy Fanning 0.07mm — Volume fans for hybrid sets FAQ How does 0.10mm flat compare to 0.15mm round classic? The flat ellipse base creates more adhesive contact, so 0.10mm flat actually bonds stronger and looks darker than 0.15mm round — at lighter weight. Ideal for clients who want more impact without the bulk. Why is the flat base better for oily skin clients? More adhesive surface area means the bond is less likely to break down from oils, giving better lash retention for clients with oily skin or active lifestyles. Can I use flat lash extensions in a hybrid set? Yes — place flat lashes as accent lashes for definition and add Easy Fanning Lashes 0.07mm fans for texture and volume. Which curl should I choose? C curl for a natural lift, CC for a moderate open-eye effect, D curl for a more dramatic open-eye look. CC is the most popular choice for clients wanting a noticeable lift without going too dramatic. Are flat lash extensions safe for clients with sensitive eyes? Yes — the 0.10mm cashmere PBT fiber is ultra-lightweight and places minimal stress on natural lashes. The FDA & CE certified materials are safe for professional salon use. Always perform a patch test for clients with known sensitivities.