Large oval pneumatic ash wood brush with pure boar bristle ideal for extensions.. Our large black oval brush with pure boar hair bristles, made of 100% FSC®-certified ash wood, is essential for creating updos. The handle is treated with vegetable waxes and oils, the bristles are in pure “Calcutta” boar hair with 99.9% antibacterial nylon tips, and the black cushion is in pure rubber. It is particularly ideal for adding volume to hair