Baby brow lamination lasts until the hairs fall out to make room for new growth — usually four weeks. While the actual treatment is speedy, maintaining the shape and health of your brows depends on how you look after them at home. “Keep them hydrated and conditioned,” advised Clayton, who recommended Mavala Double-Cils, $32. “This is so underrated,” Clayton told me, “because the main active ingredient is snail mucin,” which deeply moisturises and protects hairs and the surrounding skin. If you have more to spend, Clayton also swears by Agent Nateur Lash & Brow Serum, $118. “This is phenomenal because it contains an ingredient called Redensyl, which targets stem cells [to encourage] hair growth,” she said.