Hydrea London Bamboo Nail Brush with Mane and Cactus Bristle is made from eco-friendly bamboo. The oval shape is easy to hold and a jute string loop allows this to be hung when not in use. A basic yet quality-made essential, this Hydrea Natural Bamboo Nail Brush is a must have accessory. Hydrea London Bamboo Nail Brush with Mane and Cactus Bristle is made from eco-friendly bamboo. The oval shape is easy to hold and a jute string loop allows this to be hung when not in use.