Amazon Merch on Demand

Amazon's own print-on-demand operation lets approved sellers upload designs for apparel and accessories that Amazon manufactures and fulfills through its own supply chain. You receive a royalty on each sale while Amazon manages production, inventory, returns, and customer support entirely on its platform.

This is the simplest path for sellers who want zero fulfillment headaches, though approval is selective and royalty rates are fixed by Amazon, not negotiable.