I went one size larger and suggest you do as well. The material is comfortable, unlike the clingy stuff they sell now that feels creepy and enbarassing to wear unless you enjoy showing the world your nipples...Daily wear requires daily light wash - it picks up BO in one day.Edit: It is starting to fray/pull after one wash/dry cycle. Not a good look for longevity.The light grey color is exactly as pictured. I am 6'1" 180 lbs/slim frame, and size M was correct for me.Shirt is soft to the touch, with a pleasant waffle texture. The fabric is a little thinner than expected and slightly sheer when looking through the inside. However, I haven't had any issues with temperature so far.Nice, soft material. Washes and dries nicely. Fits true to size.I like it a lot! It’s a bit on the small side in the chest but i presume its made like that. It’s a nice, great material. Definitely stylish and nice.The main product images, showing the front and back, do not look like the actual product I received. This is really just a thermal undershirt. The main product images, as of 6/30/22, show a design of a relatively large, deep, *square*, 3D fabric texture. I would have liked a shirt like that. However, the actual material is made of a shallower, *rectangular*, 3D fabric textured, more like the familiar thermal underwear material. Other product page images accurately show the product like I received. If you are okay with that, then this is a pretty nice, basic shirt, but I selected it thinking it was like the main product images and I was disappointed.These shirt fit as expected it’s true to size. The color to it was awesome I loved it! And it has a cool waffle texture to it, I liked it. It has enough stretch to the material so doesn’t feel tight or loose just right. Totally recommend if you like these type of shirtsI'm 5'11", 195# with 19" shoulders and 45" chest. In t-shirt sizes I tend to be right around the border of a size Large and a size X-Large, so I ordered this in X-Large, hoping for a looser fit. This shirt fit more like a large and felt a bit shorter than most of my other shirts (in either L or XL). I do like the waffle texture of the fabric, it just seems a little narrow in the shoulders for an XL.wish it was a bit longer on the belly but great shirt!