Our long sleeve hooded 8oz heavy blend sweatshirts have a double lined hood as well as are constructed with Air Jet yarn for a super soft feel and will not pill. All of our sweatshirts are screen printed, which gives you the highest quality vibrant graphic images. The 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 sweatshirt! 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. Ultra-thin shirts are a 3.4 oz tri-blend of 50% polyester, 25% cotton, and 25% rayon. This unique blend creates a soft, lightweight shirt that lasts. All other colors are 100% Cotton. We typically stock Canvas brand fitted cut shirts, think "American Apparel" Style. The Tri-Blend Ultra-Thin shirts are very thin and comfortable. 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!