The specially shaped head provides comfortable and easy access to back teeth for effective brushing Neck: Elastic rubber neck ideally designed for better control and absorb excessive pressure while brushing. Filament: New nylon filaments with rounded ends help to protect tooth enamel and gums; Double action bristles in professionally designed shape clean teeth surfaces and massage gums simultaneously Tounge Cleaner: Soft rubber tongue cleaner for eliminating the bacteria on the tongue surface and inside the cheek. Grip: Comfort rubber injected grip for safe and stable brushing free from sliding