Based on the original design by Dr. Charles C. Bass, M.D this brush has 3 rows and a total of 20 tufts and is of medium firmness to suit most users.
Bristles with medium firmness are more effective at disrupting bad bugs in the mouth than bristles that are too soft (soft bristles tend to just mash against the teeth and gums).
If a toothbrush handle is very large, then too much pressure is easily applied and has the possibility of damaging delicate gum tissue.
A bulky handle limits the dexterity and control required to effectively clean teeth and this toothbrush is designed so you control it, and not the other way around.
This toothbrush differs from regular ones in other ways too - the bristles are more spaced out and there are fewer bristles in the brush head.
The bristles are very thin with carefully polished, smooth, rounded tips, this makes them soft and gentle, compared to other toothbrushes.
What Dr. Bass found was most toothbrushes had too many bristles to effectively wiggle between the teeth and down into the gum line.
So, he created a brush with much fewer bristles to be able to get down where the bad bugs thrive, to disrupt and remove the bacteria.
The same is true today as most conventional toothbrushes have too many bristles to effectively use the Bass brushing technique.
See the photos above right to compare the rounded bristle tips of the Bass toothbrush and the jagged, roughly-cut tips of many other toothbrush bristles.
Five colours are available and you'll receive an assortment - stock permitting.
For a battery-operated version designed on Bass principles check out the Oobrush