This brush is ideal for applying powder shadow within the crease of the eye to add depth. Bdellium Tools Green Bambu series brushes are professional eco-friendly makeup brushes with all sustainable bamboo handle and all vegan soft synthetic bristles with an anodized aluminum ferrule. Bamboo is one of the most sustainable resources and environmentally sound plants on Earth. Due to its rapid re-growth cycle, it can be harvested with virtually no impact on the environment. The advantages of synthetic bristles includes less or no hair shedding compared to natural bristles, it is easier to clean and provides a light application. The synthetic bristles are hypoallergenic and 100% cruelty-free.