Kent Signature Royal is a new toothbrush adopting a tetra tip technology for upper bristles (10,000) to massage sensitive gums and agitate deeply between teeth and into crevices to remove food particles, and the lower layer bristles are thinner and softer than 0.01mm Curved bristle-alignment, complementing the shape of the gums - effectively massages gums and promotes gum health. The stepped design for the toothbrush head prevents people from getting caught in the interdental gap. Silver coated bristles - Ensures hygiene even in humid bathroom conditions Eco-friendly bristles & handle - BPA free, Phthalate free, 100% recyclable Made in Korea specially under license with G.B. Kent & Sons Plc. in the UK