REACH Dental Floss Wax Scent Free 50m Wax-coated for easy insertion between teeth. Recommended for flossing beginners. Even healthy mouths have gum pockets about 2 to 3 mm deep, which tend to accumulate plaque and are especially important areas for care. These spots are hard to clean with a toothbrush and are the most common places for plaque buildup. Dental floss can effectively reach gum pockets and tight spaces between teeth to thoroughly remove plaque.