The outer surface, or face fabric, of most laminated waterproof-breathable garments is treated with a factory-applied durable water-repellent coating (DWR). This chemical treatment enhances the performance by forcing water to bead up and roll off the surface of the fabric.
Because durable water repellent coatings are not as effective when clogged with dirt or salt, it is important to clean your garments regularly. Coatings are non-permanent and will eventually wear off. When the garment begins to "wet-out" the face fabric is absorbing water, and it's time to re-apply the coating.
Wash the garment with an additive-free detergent or soap. You can use regular laundry detergent, but you may have to give it an extra rinse or two to get rid of any residue. Do not use liquid detergents or delicate detergents as they contain fabric softeners that can impede the effectiveness of the DWR finish.
Wash the garment with an additive-free detergent or soap and apply a DWR treatment. Use a spray-on treatment for 2-ply garments. Wash-in products work well for both 2 and 3-ply garments.