Built for life and work in the city, Timbuk2's Proof Messenger works with a blazer or a hoody. Rugged waxed canvas, heavy duty zippers, and genuine leather trims are tough as nails and get better with age, so you can be hard on the Proof without worry. We added a grab strap for an elegant departure after closing your deal. Designed to carry and protect your MacBook and other work essentials, the Proof is organized and practical, but handsome and versatile. Carry it everywhere you go.