brand new, received in my Beautylish 2025 box, own too many brushes already. A stunning workhorse for fast, effortless application as a laydown brush, smudger, or definer. About Sonia G. Fundamental Builder M Sonia G. Fundamental Builder M is a stunning workhorse that’s great for experts and newbies alike. With a pinched ferrule and square-ish shape, it offers the same strength across the surface for even application. Previously released as the Builder Three, it has an amazing grip on the product while being silky-soft and comfortable on even sensitive skin, thanks to the super soft natural goat bristles. Enjoy faster and effortless application as a laydown brush, smudger, or definer. Why It's Special Designed with a pinched ferrule and square-ish shape that’s effective as a laydown brush, smudger, and definer The sturdy handle is made from delicate yet durable walnut wood—finished without lacquer, so you can see the grain and feel the wood Natural soft goat bristles, with similar softness to saikoho, are reliable and comfortable on even sensitive skin Each brush is handbound by master artisans in Japan using traditional brushmaking techniques for unparalleled performance and craftsmanship Previously released as the Builder Three—with an updated handle Part of Sonia G.’s updated Fundamental Eye Series