On the outside of our 3XDRY® garments, the fabric is water and dirt repellent. Simultaneously, on the interior of the fabric perspiration is quickly absorbed and transported away from the body. The moisture is then distributed over the surface of the fabric and evaporates rapidly. The result is ultra quick drying. Perspiration marks are basically invisible from the outside of the garment. Because moisture evaporates close to skin, this amazing technology also assists the natural cooling process of the body. Sweat stains be gone.