William Rast Dean Slim Straight leg Jean great fit with any shirt or jacket. The brand was founded in 2005 by childhood best friends - Justin Timberlake and Trace Ayala. The name derives from both Justin and Trace's grandfathers, making the brand more personal and rooted in their family heritage. Steeped in southern heritage, mixed with an LA vibe, William Rast has taken everything iconic about American Jeanswear and made it new. He is a modern gentleman with an edge. His style is raw, confident, timeless and refined.