Our new thermal long sleeves include a heavyweight waffle knit fabric. Made with premium material that is meant to keep heat insulated, this long sleeve is meant for more than just looks. Other than its functional use, it provides a more fitted and slightly cropped bottom look, with sleeves that have plenty of room to comfortably wrap around the arm, and a collar that sits tight but not too tight around the neck. This was created to be the perfect thermal. *We recommend sizing up as it is fitted.