I bought two of these shirts and washed them in hot water and put them into the clothes dryer and they both came out almost exactly as they were before with no shrinkage. That's rare and I really appreciate it. I ordered two more today. They shirts are not light weight. They are between a normal teeshirt and a very light sweatshirt and that's perfect for me. The collar remained in shape after washing and drying and the sleeves didn't shrink up.
I just love these long sleeve shirts from Size Up. This is starting to be my favorite brand as I have several t-shirts and other shirts from them. Always good quality and a decent price point. I will absolutely purchase more on their store.