ISSA™ 3 Sonic Toothbrush Black Adult Polymer (1244530_EA) 1/EAIntroducing the world's first silicone sonic toothbrush and largest oral care advancement in 70 years, ISSA 3 cleans it all teeth, gums, cheeks and tongue Featuring medical grade silicone and PBT bristles, it's tough on plaque yet non abrasive on gums so sensitivity and receding gum lines are a thing of the past Improved Hybrid Wave brush head with 2x stronger bounce back bristles Bacteria resistant silicone is 10,000x more hygienic than nylon