Browhaus' specialists spend up to two months at a training center in Singapore to perfect the shop's face-spiffing techniques. Each treatment wields semipermanent makeup or vegetable dye that can last for years and fades naturally, unlike Sharpie-drawn tan lines. The Eye Define treatment pops peepers with a stroke of semipermanent eyeliner on the upper or lower lid that can last up to three years. Makeup mavens also help to shape pursed pouts with the Lip Define treatment, which imbues a natural look by lining and filling in mouth lids with subtle color and giving new life to unshapely, thin, or waxed lips. Brow Resurrection, the shop's signature treatment that has been performed more than 10,000 times worldwide, fills in for overplucked or misshapen arcs by camouflaging blanks with hair-matching hues. Most boosted brows last up to two years, at which time drawn-on thickness returns to its previous position as extra fuzz for Wooly Willies.