ABOUT WRANGLER. In 1947 the Blue Bell Overall Company designed and tested 13 pairs of prototype jeans and introduced the. Wrangler 13MWZ. to American consumers. Originally a cowboy jean Wrangler grew to be one of the defining American denim brands. Today Wrangler utilise their rich history to create authentic jeans and clothing collections that call upon Wrangler's all-American spirit. Body: 98% Cotton, 2% Elastane.