Shirts are a lightweight cotton jersey knit from M&O. They are super soft and comfy. They are silk screen printed by hand, all by me. These are not those crappy drop shipped print on demand tees. They are made in limited batches, so sizes are all limited. They are pretty standard unisex sizes, and have a little more length. They are pre-shrunk and can go in the washing machine, but it is recommended to hang-dry, avoid the dryer.