The Long Haired coat mutation occurred in 1972 in the USA. Females have a longer coat than the normal short haired, having a fluffy appearance. However due to the mutation being affected by testosterone it is the males that can develop the stunning long coats. Some males may have a few tufts of long hairs emerging from the hips or around the bottom whilst others may have thick long fur all other the back and sides.

It is possible to produce Long Haired hamsters in all colours and coat patterns and the Long Haired can be combined with Satin to produce Long Haired Satin and Rex to produce Long Haired Rex, or even Long Haired Satin Rex.