This Eco-Reinforced Boar Bristle Round Hair Brush for Thick Hair is made with birchwood, and reinforced boar bristle- all sustainable materials! The ergonomic handle provides a non-slip grip that limits stress on hands and shoulders. The extra firm and thick boar bristle stimulates the scalp's production of natural oils and penetrates even the thickest of hair- leaving a polished, shiny blow out. Getting curly frizzy hair to have a silky smooth shiny finish. Boar bristles are specially designed to make your hair shiny and smooth. Boar bristles are the same texture as human hair. Pulling your hair's natural oil's from roots to tips for a natural conditioning treatment. Healthy hair starts with a healthy scalp, so brushing with an all-natural boar bristle hairbrush will give your hair luster. Best used on course thick or curly hair. The classic hairbrush comes in 6 different size'