The softest 0.15mm classic flat lash extensions — cashmere PBT fiber with a flat oval base for stronger lash retention, lighter feel, and a naturally fuller lash line without volume fans. Ideal for professional lash artists serving clients with sensitive eyes or fine natural lashes. Why You'll Love It Cashmere PBT fiber — processed to be softer and more flexible than standard PBT, giving a more natural look and feel against the skin — especially noticeable for clients with sensitive eyes Flat oval base — wider adhesive contact surface creates a stronger bond with less glue needed, improving lash retention over standard round classics Fuller-looking lash line — the flat base creates a darker, more defined lash line than round 0.15mm classic lash extensions at the same weight Same technique as round classics — no new skills required, just better results Key Features Flat oval base — wider adhesive contact than round classic lash extensions 0.15mm cashmere PBT fiber — softest classic flat lash extension option Matte black finish Available in 3 curls: C, CC, D 8–15mm mix tray — ideal for lash mapping and full classic sets FDA & CE certified — safe for professional salon use Cruelty-free, vegan materials Duty-free shipping to US & EU Best For Lash artists serving clients with sensitive eyes or fine natural lashes Everyday classic lash extension sets where comfort and retention are priorities Clients wanting a natural, fuller-looking lash line without volume fans Professional lash artists wanting better retention than standard round classics without changing technique Specifications Base Shape Flat oval Thickness 0.15mm Material Cashmere PBT Fiber, Matte Black Available Curls C, CC, D Available Lengths 8–15mm mix tray Certifications FDA & CE Certified, Cruelty-Free Compare Options — Cashmere Flat Lash Extension Range Thickness Effect Best For 0.15mm Cashmere Flat — You are here Natural classic — softest feel Sensitive or fine lashes, everyday 0.20mm Cashmere Flat Defined classic lash extensions Clients wanting more drama Ellipse Flat 0.15mm Classic volume — most popular flat lash Most clients, everyday wear Ellipse Flat 0.20mm Bold, dramatic flat lash extensions 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 extension ensuring the flat base faces down toward the natural lash Dip — Dip the base into 0.5s Lash Glue — use minimal adhesive; the flat oval base bonds with less glue than round classic lash extensions Apply — Place 0.5–1mm from the lash line and hold for 2–3 seconds Cure — Use a nano mister to cure and seal the adhesive for maximum lash retention Related Guides Flat Lash Extensions vs Classic: Key Differences You Need to Know Lash Retention Guide: Why Extensions Fall Out and How to Fix It My Client Has Sensitive Eyes — Which Lash Glue Should I Use? Complete Your Classic Lash Extension Kit 0.5s Lash Glue — Fast bond for flat lash extension application Eyelash Primer — Prep for 30–50% longer lash retention Cashmere Flat 0.20mm — Step up for more definition and drama Ellipse Flat 0.15mm — Standard flat classic lash extensions for everyday wear FAQ What makes cashmere PBT different from standard PBT lash extensions? Cashmere PBT is processed to be softer and more flexible, giving a more natural look and feel against the skin — especially noticeable for clients with sensitive eyes or those who find standard lash extensions uncomfortable. Why does the flat oval base improve lash retention? The wider flat base creates more adhesive contact surface between the flat lash extension and the natural lash, resulting in a stronger bond with less glue needed — particularly beneficial for clients with oily skin or active lifestyles. Do cashmere flat lash extensions apply the same way as round classics? Yes — same technique, same adhesive. No new skills required. Simply ensure the flat base faces down toward the natural lash for maximum contact and retention. Should I choose 0.15mm or 0.20mm cashmere flat lashes? 0.15mm for natural everyday wear and sensitive or fine natural lashes. 0.20mm for clients wanting more definition and drama while still enjoying the cashmere softness.