Mexicat raicilla is 100% agave Maximiliana, a large silvestran agave of unusual deep flavor, specifically a local variety known as lechugilla tipica (there are three main Maximiliana varieties: típica, pencas caidas, and pico de aguilar). Maximiliana looks like a giant cousin of the famous tobalá: they share a reputation for complexity.
Mexicat has started a massive sustainability program with the Maximiliana. Its major fields are now 4-5 years old. Mexicat raicilla is now 80% wild agaves; that percentage will be reduced as the cultivated fields come on line.