I picked up the CatWarm Traditional Long Sleeve Hush Fiber Top for chilly morning commutes and it does the job well. The Toboyo Fabrics material from Japan feels substantial, and the built-in far-infrared heating plus heat storage really does keep warmth in without feeling bulky. The classic Eastern design looks clean and understated, easy to wear with jeans or layered under a jacket. It is not the lightest top, so I would not wear it on mild days, but for cold weather it works great. Sizing runs true for me.