The GUM Trav-ler interdental brushes remove nearly 25% of dental plaque. The diameter is 1.3 mm to easily pass through the tightest spaces. They have a nylon-coated shaft to avoid irritating sensitive areas. The bristles are impregnated with a particularly powerful antibacterial agent, Chlorhexidine, which allows for una effective and gentle cleaning. All brushes have a very flexible handle for una great ease of use.