Medium Bristle：Innovative Hollow Dual-Spiral Bristle Toothbrush-
Outer ring of spiral soft bristles conforms gently to tooth surfaces without irritating gums for mild protection; inner core of spiral medium bristles provides robust strength to effortlessly dislodge debris and stains from interdental spaces.
The wide brush head maximizes cleaning coverage, effectively cleaning more teeth in a single stroke to save time and effort.