Homozygotes are recognizable at birth by their short, curled whiskers, which gradually lose their curliness, but remain slightly irregular throughout life. The coat has a glossy appearance similar to that of satin mice. All hair types are present, but they may show irregularities in the diajmeter of the shaft and irregularly spaced medullary cells. The air spaces of the medulla are filled with fatty fluid. This changes the optical properties of the shaft and accounts for the lustrous appearance of the coat. (Trigg, M.J. 1972. J. Zool. Lond. 168:165-198.)
Satiny animals with curly vibrissae were observed in a litter of DBA/2J in 1964. Embryos produced by crossing homozygous B6.D2-lt/J males to C57BL/6J females were cryopreserved in 1981.