Matrix Percs bongs are often considered the holy grail of water filtration in bongs, and its easy to see why. Matrix Bongs They offer 360 degrees of diffusion, often boasting over 50 separate holes for smoke diffuse through which is more than most percs! Watching one of these matric perc bongs in action really captures its filtration prowess, with layers of bubbles stacking on top of each other. 

Matrix Perc Bongs do tend to clog a bit easier than other percs due to the smaller holes, so they tend to be accompanied by an ash catcher.