This ski mitten has a waterproof membrane that consists of a very thin polymer film, placed between the lining and the part of the glove in contact with the outside. This membrane acts as a barrier to water and makes the product waterproof. In addition, the outer materials of the product benefit from a water-repellent treatment that reduces water absorption. Only a rubber-type glove is watertight. A glove with a membrane, under extremely damp conditions, will have limited waterproofness.