Mammut's best seller, the Nova IV Mid GTX Boot is a stable and durable hiking boot that lets us take on trails with confidence. The leather uppers and mid-cut ankle collars provide plenty of protection, and the GORE-TEX membrane backs that up with reliable and breathable waterproofing. We also like this boot's traction, courtesy of its Vibram outsoles, which provide great grip on a range of surfaces, letting us hike pretty much anywhere in these boots.