Hello Goldilocks! Which synthetic brush will you choose? Shown from left to right are Baby, Sister and Mama Flat Top Kabouki's.
I found this brush to be excellent for sensitive skin because the shape encourages the application of powder to be in one direction and so dissuades the tendency to 'buff'.
Super-soft. The Momma is good for going over the whole face after application to whisk away any excess.
I got my mother the Sister Contour Kabouki for her very sensitive skin. She also has some ice-pick scars where the MMC tended to collect, but this brush has resolved that problem. She really likes the softness.