Silvermane is a quite new variety. It was discovered in 2012 by a Rattery in North Carolina named Squeaks and Nibbles Rattery. From there it was shared with a handful of select breeders as they worked to create a standard for it. Silvermane's have a very unique look. Their coat should consist of one color with lighter hairs giving them a silvered look. Their base color can come in a variety of colors but looks best on darker shades. The standard that most are going for is to have 50-75% of the hairs be "silvered". The nose/muzzle should be a bit dark giving them this really lovely look. Silvermane babies coats start out as their color standard. Then around 12 days - 8 weeks of age they begin to "silver". It seems some gradually lighten and others are much quicker. Silvermane is a coat type and not a color. Some breeders were able to look at the hairs under a microscope and find that the hairs are not actually silvered but instead empty or clear at the tips! Silvermane also have a softer coat. Honestly, it does feel so soft & plush and like heavenly, I could just pet mine forever lol Interestingly enough it seems to generally look far better on male and standard size rats. By far most females do not have as striking of a silvery appearance. On some dwarf rats it also looks darker.