The outside? A coat of Scottish, wax which gives the jacket a distressed, vintage look the more you wear it. The inside? A soft, brushed flannel lining. We spent a lot of time choosing the wax for this jacket because it's called a waxed jacket. So the wax is pretty important. We ultimately went with a Scottish vendor who's been proofing fabric against the elements since 1864. This wax is, durable, and when the fabric is bent, cracks in a way that gives the coat a unique distressed appearance. Made with 100% authentic proofed cotton in custom colors ya can't get anywhere else. Alex, who starts every day with yoga and a pitaya bowl (you can Google it...we had to), is 6'1 and wears a Medium.