This type of coat are worn by many terriers.
The outer coat consists of harsh, wirey hair for protection and a soft undercoat provide insulation. This type of coat can be either hand stripped which is a process that brings out richer colour in the coat and retain the desired harsh texture. There is a special type of shampoo that leaves the coat harsh, it is advisable not to use conditioner as it will soften the coat.
For pet owners that would like to keep this this type of breeds as pets they can be groomed with clippers to give the desired style.