I have the "charcoal gray" color of this shirt which looks like the dark gray in the picture here. The shirt is extremely comfortable in cool weather. It feels like a mix of cotton with some synthetic fibers. At another website (flipkart won't let me put the name here but you can guess or search) it was listed as sweat wicking athletic material (or some similar wording) and it definitely works like that. Does not smell much even after wearing all day. ...