The 6000 Ultra Soft Silky Bristles Are 10 Times Thinner Than Any Other Toothbrush Bristles, Making Them Extremely Soft And Gentle On Tender Teething Gums. Designed To Be The Ideal Size For A Toddler’S Grip - Perfect To Introduce The Habit Of Toothbrushing Brushing. Non-Slip Grip. Nano-Silver Helps Keep Bristles Clean.