These used Men's Mk III's are probabaly the most comfortable boots ever made & can last a lifetime, if you just periodically replace worn soles (see web review below). No Gortex gimmicks to leak or wear out----just regular silcone and occasional Dubbin wax. Full smooth leather lining to prevent blisters & no insulation to overheat your feet or add weight. Quad-stitched seams. Gently worn non-clog tread. Fits Men's 8 1/2 D using a layered sock system. Surplus dealers ask $40 for trash. Asking only $15. Offers??