Cuddl Duds Thermal Turtleneck XL Black Warm but lightweight, incredibly soft. Wear as a base layer under other clothing or on its own as it is not transparent. I layered this under another sweater and coat for a 2 week trek through 10-20° Temps at European Christmas Markets and I stayed warm without feeling 'bulky.' Depending on how you like the Fit, could be worn on a Large, XL or 2X build. Machine Washable