Sleeveless Stone Washed Worker Black is made of Stone Washed 100% Cotton, Denim using skin friendly, Azo-free, Reactive dyes. A Bulldog on a boss hog, this guy is not to be messed with…he is quite simply bad to the bone. And when he aint chewin’ on a bone, he’s kicking up dust on his motorcycle as the President of the local M.C. Pound for pound, this mass of muscle and slobber is the baddest of the bunch.