Hoodies

The Gildan 18500 hoodie is a staple of print on demand stores. They're comfy, but I don't depend on them in seriously cold weather. 

Most sizes cost $16.78 to print and $8.49 to ship, so my margin is ~$13. $5 of that goes to my mortgage principal (not usury or taxes) and the rest pays for store expenses, designs, income taxes, etc.