100% Pre-shrunk cotton. Short sleeve, crewneck, 4.2oz lightweight modern cut t-shirt, which means that it has a fitted cut. The heather grey shirts are made of a soft 90/10 cotton/poly blend. If you want a looser shirt, please order a size larger than you typically wear. All of our shirts are printed on a state-of-the-art Direct to Garment printer, which gives you the highest quality vibrant graphic images. They are not "iron on" images that will flake off in a few washes, but are made to look as great 100 washes from now as they do right out of the package. Thank you and enjoy your shirt!