Rhoost Natural Brush and Comb Set for Baby. This brush and comb set is an all natural wooden alternative to plastic sets made from synthetic materials that may contain toxins harmful to your child. Natural wood contains natural oils and properties that make it ideal for cradle cap. The plastic-free Rhoost natural pig hair bristles are odorless unlike the bristles use in other natural brushes. Brush and Comb Set for Baby is made from renewable bamboo so it is kind to the environment.At Rhoost, our goal is to create products that allow parents to spend more quality time with their loved ones. Rhoost is committed to creating innovative solutions that are safe for babies, safe for the environment, and easy to use.