Reference: 371595 The sleek look of the X ULTRA 2 GTX® for women indicates the speed with which you'll conquer every trail. With running shoe technology mated to a lightweight, protective upper and a GORE-TEX® waterproof membrane this lightweight hiker likes to move fast all year long. Technologies Benefits Stability Taken from our most stable running shoes, the Advanced Chassis delivers stability and support on rugged terrain. Lightweight With a sleek design and lightweight materials, this nimble boot keeps you on your toes. Weather protection Shackleton could only dream of an all waterproof breathable adventure boot like the X ULTRA.