Jack Frost (JF) is a ghostly-white albino strain of Psilocybe cubensis that seems to have it all — looks, potency, and contamination resistance.
This strain gets its name from the aesthetics of the fruiting bodies it produces. Jack Frost produces flat caps that curl upwards as they begin to drop a blanket of fine white spores. They look as though they’ve been covered in a dusting of fresh snow. 
The gills take on a bluish hue, which is a clear indication these shrooms contain a lot of psilocybin (although recent testing data suggests it’s about average).
The fruiting bodies are medium in size, with dense stems and relatively heavy caps.