Mountain Khakis Men's Size Chart Dress up a Henley? Mountain Khakis has what you want. Paddle shift into sixth gear with this fast-forward design. The Mixter is upgraded with a twill collar, metal buttons, and button cuffs. Features: - Relaxed fit - Woven twill collar and cuffs - MK metal buttons - MK embroidery at center back neck - 100% cotton