Slipknot and Dixxon Flannel have teamed up on a new Slipknot flannel, for sale now at their site. In addition to Slipknot, Dixxon has collaborated with Slayer, GWAR, Suicidal Tendencies, Mudvayne, and others. 

https://slipknotmerch.com/collections/all-apparel/products/slipknot-x-dixxon-flannel?