Stone Eater's Sweatshirt (Peat):

The official shirt for Cactus Store's new cactus and succulent soil: STONE EATER'S
The vast majority of desert plants are "stone eaters". They don't like organic-based dirt, they like minerals. Xeric plants live amongst boulders and rocks, in sand, on cliff faces, in lava fields, etc., to be close to their favorite food... stone. 

Stone Eater's, because desert plants eat rocks... not dirt. 

Best quality, ethically made in Los Angeles, USA