The 1006 Vioz Plus GTX RR WL features the new Vibram Darwin sole, exclusive to Zamberlan, with a dual-density PU midsole (one lower-density layer for cushion and one higher-density for stability and shock absorption). The Darwin re-solable outsole features excellent tread for superior grip, good downhill braking, a toe-climbing zone, and lugs wide enough to be easily cleaned with a stick or finger. Feel the slight rocker on this boot as you climb uphill with ease. The patented Flex-STM system allows the upper to break with the heal for comfort during strides, without compromising support to the ankles. The 3/4 rubber rand (RRS) will keep the uppers in great condition through rocky terrain. Corrosion resistant hardware allows for easy lacing. The GORE-TEX lining provides the utmost protection and breathability while the MICROTEX wicking nylon collar lining helps control excess moisture. Wider last is 3mm wider than regular Zamberlan last, making the boot more comfortable for the average wearer but also a nice technical boot for those with wide feet. Fits up to a size EE comfortably.