Gore-Tex is made with a microporous membrane structure.
For additional long-term comfort, this boot has a fully padded collar, and a (removable) extra thick PU Rocky Terra Suspension footbed with Air Flow design. The Outback rubber outsole provides long-lasting traction and stability on rugged terrain.Each pore is much smaller than a water molecule, but bigger than a water vapor molecule, which means no external moisture - from rain, snow, sleet or puddles - can penetrate the membrane, but internal moisture from perspiration can easily evaporate. So you can easily see why these are great shoes to wear while you are outside, enjoying the glory of Mother Nature.