Tight spaces between the teeth are hard to reach. Floss is great for the areas between the teeth, Hard is the area close to the bottom of the teeth. Here you nees sometime a interdental brush or soft pick to remove food which sticks there.  
Our new patented flosser combines both gfeatures in one. A very flexible soft pick + interdental floss. With unique feature to reach also the back teeth and coated with medical caring agents, which the profession recommends and a fresh lemon mint taste.