This toothbrush features a special bristle design with three rubber strands twisted at the tip, known as "Triple Rubber Bristles," and a "Spiral Edge Bristle" made from hexagonal bristles at the back end. These two types of unique bristles ensure a smooth surface for your teeth. Additionally, the slim head and curved cut allow for easy access to the back teeth. The compact head enables thorough cleaning in every corner. ■Bristle hardness: Soft ■Model number: B-8058S ■Bristle material: Black part: Saturated polyester resin, thermoplastic elastomer; Color part: Saturated polyester resin ■Handle material: Main body: Saturated polyester resin; Rubber part: Thermoplastic elastomer ■Heat resistance: 60 degrees ■Made in Japan ■Individual package size: 33×230×15mm, 20g