When syncing products in Printful, you can ignore a product by clicking Stores → Sync → Ignore product.
Ignoring a product means you're letting us know we shouldn't fulfill the product if it's imported in an order. If an ignored product is the only product in an order, it won't be imported to Printful at all. However, you can continue editing ignored products to unignore and publish them at a later time!
To find out more about ignoring products in Printful, please watch this video: