4 Layer Twin Sensor Waterproof/Breathable Fabric: Nylon Shell Fabric with DWR Finish, Hydrophobic/Microporous Coating, Laminated Membrane, Nylon tricot lining * Super Stretch Neoprene Neck Gasket. MasterSeal waterproof cross-chest entry and relief zippers. Cordura reinforced seat and knees with mesh drainers * Fabric drysocks are universally sized. * Hand Wash Soap and Water * USA