An all-new design, based on the classic Darien pant. Every feature of the original has been tweaked, refined, enhanced and improved. The correct stuff is still the same: The AD-1 is a fully seam taped, unlined, lightweight, Cordura nylon three layer GORE-TEX® jeans-cut pant, with full length separating side zips. Its Cordura is a slightly tougher 600 denier (about 5% more abrasion resistant), but the functional outside zippers still have full length inner and outer weather flaps to help the pants go on and off fast and keep rain and wind out. Other improvements include: A diamond gusset in the crotch for greater sitting comfort; An inner gusset behind the front fly improves water resistance; The knees have a greater bend, around a larger radius, allowing more freedom of movement; The Scotchlight® reflective ankle tab loop strips are radial, for a more natural and secure adjustment around the calf and lower leg; The front pockets have hook and loop secured cover flaps so items inside are more secure. (And you won't loose your change or bike keys when the pants are laid over the back of a chair. A vertical zippered cargo pocket has been added to the top of the right thigh.