The Nebelung is a young and very rare breed, developed in the 1980s in the United States from two blue longhaired kittens named Siegfried and Brunhilde, after characters in the German saga that inspired the breed's name, which means creature of the mist. Russian Blue outcrosses helped set its type. Nebelungs have a medium, graceful build, a semi-long silky coat of solid blue tipped with silver, and vivid green eyes.
Many Nebelungs are gentle, quiet cats that bond closely with a few people and stay reserved with strangers or busy households. They often like predictable routines, soft play and a lap on their own terms rather than constant handling. The silky coat tangles less than many longhairs but still needs weekly brushing. Because purebreds are scarce, most blue longhairs in shelters are domestic longhairs, which can share a similar look and gentle temperament.