The Essential Dog Bamboo Two-Sided Brushes are naturally fumigated with high pressure water without the use of pesticides. Use the fine tooth brush to remove tangles and bristles to smooth and add shine to the coat.  Gently brush in the direction of the hair growth and remove hair from brush as needed. Can be used with our deodoriser or spray-on conditioner to further assist brushing.  Please note there is one hole in the rubber to allow air to escape.