This brush has no limits when it comes to application. The angled side can be used to apply brow product, eyeliner, lip liner, or eyeshadow along the lash line, while the flat side can be used for eyeshadow, concealer, contour, or smudging eyeliner. Made of soft, synthetic microfiber bristles, it is both vegan and cruelty-free. The handles are made of sustainable bamboo wood, making them an eco-friendly choice.