Product Description
SealSkinz socks and gloves use a different type of membrane called hydrophilic (water loving). Hydrophilic membranes are totally solid, without pores. It is therefore physically impossible for droplets of liquid water to pass through the membrane, however, it is breathable because water vapour molecules are transmitted from molecule to molecule through the membrane on the polymer chain and expelled on the other side. Every single SealSkinz product is tested before it leaves the factory. The sock or glove is mounted onto a machine which subjects it to water pressure. If any product leaks, the item is rejected and diced. The waterproof film can withstand 10psi of hydrostatic head pressure, the equivalent of a column of water 700cm high standing on the fabric surface. This is 7 times the level required to meet European Standards for waterproof clothing. The internal climate, next to the skin, is hot and humid because the body is generating heat and moisture as it exercises. The external climate is much drier and cooler. Consequently water vapour is driven from the inside of the garment to the outside. As the hand gets hotter during an activity, so the film becomes more efficient at expelling moisture. SealSkinz incorporate patented technology to give us socks and gloves which are waterproof, breathable and elastic. The middle layer of the sandwich, the waterproof breathable membrane, is corrugated or ruched, so that as the fabric is stretched, the membrane itself doesn't stretch, it merely unfolds. This not only means that the membrane is put under less stress, but also that the product extends (stretches) under a lower force because the film itself is not being stretched. This means that SealSkinz extend easily over the heel or hand as they are put on, and recover back to fit closely around the ankle. Because they fit closely, there are no excess folds of material, which may lead to blistering