Sizes S through 3XL are a 50/50 blend. They are an athletic cut that uses combed cotton for a soft feel.
** If the shirt size you are looking for is out of stock here at sharpsbros.com, there are a couple other purchase options:
Buy from your local gun store: Just about every gun store in the US has an account with RSR Group (rsrgroup.com). RSR is a major distributor of our products including our shirts - but they only sell to FFL holders. Ask your local gun store to bring one in for you. You pay the same price and your local store makes a little money too.
Buy online from another sporting goods retailer: Here is one of my favorites: Mazamas Sporting Goods. They buy directly from RSR Group and they sell our shirts online as a result. Here is the link (click here).