Work Hard - Play Hard - STAY WARM. Keep your face and neck warm in comfort. The patented NX4 combination neck warmer/face mask with anti-fogger is just what you want on cold, windy days. The NX4 is easy to put on and remove with the adjustable Velcro strap, is windproof, has moisture wicking technology and includes 3M Thinsulate insulation. It features a water-resistant DWR coated material made from recycled plastic bottles. The face mask is concealed in a weatherproof zipper pocket. When the wind and snow start to blow, simply unzip the pocket, pull out the mask and place over your face. The breathable, soft fleece lined face mask with adjustable anti-fogger keeps your goggles and glasses from fogging.