In this video, I demonstrate the PFB (purl front/back) increase in slow-motion for visual learners. The other videos in my slo-mo series can be found here.

My regular speed PFB video can be seen here.

My slow-motion Knit Front/Back (KFB) video.

The yarn I use for demonstration is Paintbox Yarns Wool Mix Chunky. The needles are ChiaoGoo bamboo.