When your tootsies need just a little more, the NRS HydroSkin 0.5 Wetsocks provide the perfect amount of insulation under neoprene booties and wetshoes. Better yet, take your Chaco and sock game to the next level. Premium nylon-spandex exterior with a DWR coating sheds water without adding bulk. 0.5 mm neoprene core for lightweight insulation. Soft, smooth and hydrophobic interior feels great against bare skin. Titanium-laminate adhesive helps retain body heat. Anatomically shaped left and right feet for a superior fit and unmatched comfort. Pairing snaps prevent you from hitting the river with only one sock.