Home » Hanafi Fiqh » Fatwa.org.au » Is it permisbale to use SealSkinz socks as a replacement of khuffayn (leather socks) for doing masah? If yes, what are minimum qualities the SealSkinz should have? Will the SealSkinz with following features fulfil the requirements? JazakAllah Khair “Waterproof year-round comfort for active outdoorsmen! SealSkinz® socks have a patented fabric structure of three highly engineered layers including a membrane capable of allowing perspiration to escape while not allowing water to penetrate. plus SealSkinz® seamless design provides the ultimate action, performance and comfort. Mid-calf height 11-Inches, Polar Fleece-lined and waterproof for cold and wet conditions. This Mid-calf-high waterproof sock is insulated with a liner made of expedition-weight double velour Polartec® Power Stretch™ fleece (7.3 oz. Per square yard). The outside layer is knit of nylon/lycra® spandex offering a durable, flexible, stretch covering. In between the two fabric layers is our waterproof MVT membrane. These three layers are securely bonded together throughout. This combination of materials provides a very soft, comfy, warm, stretch-to-fit sock suitable for a whole host of cold, wet, nasty outdoor conditions.”