San Andres wrappers are harvested from Cuban-seed tobacco plants, grown in the San Andres valley of Mexico, and as such is often referred to as "Mexican San Andres". It can come in a variety of shades and be used for filler/binder as well, but is best known for it's use as a maduro wrapper.
San Andres tobacco has a bold, spicy body to it, but is also very smooth. Normally convert a natural sweetness and some chocolate notes. Cigars with a San Andres wrapper, especially a maduro, are usually in the medium-full to full strength range.