All DrymaxX shoes are made with the same sock construction, i.e. the lining fabric laminated with a waterproof membrane is sewn into a sock, and the seams are taped with waterproof tape. This prevents water from entering the shoe but does not prevent the upper textile from getting wet. Since the membrane is on the inside, it does not wear out in use, and its waterproofness cannot be measured in pillars. The membrane itself holds 100% water. In those cases, when the membrane or taping has managed to tear, the shoe leaks. It usually requires some physical trauma, and the leak is localized to a certain spot. The membrane does not wear out over time.