TENA Washable Underwear is made with high-quality fabrics. But how can they offer protection against leaks and moisture? The answer lies in the textile technology’s smart design with a built-in protective gusset made of four layers, each with a very specific function. First, a top moisture wicking layer quickly drains the surface to keep your skin dry, then several absorption layers hold liquid to keep you fresh. A liquid barrier layer keeps liquid in the product, so it doesn’t leak. Our products are lab tested and approved to meet our high quality standards.