This jacket has a zip-out liner to take advantage of changing weather conditions, and air vents under each arm. Features include braid trim, size adjusting tabs at side, "Pistol Pete" pocket configuration, many pockets inside and out, and zippered cuffs with Velcro tabs for easy on-off. Sized by chest measurement 38 to 64. Measure around widest part of torso, wearing a shirt. Add 2" to exact measurement for correct size to order to give room for easy movement.