Blank products are undecorated items from the Corporate Merch catalog. Once they’re in your store, your customers can add their own logo or artwork using the design tool on the product page, and Corporate Merch produces and ships each order as designed.
Blank products sync the same way as your customized products.

The app imports blank products from Corporate Merch in the background. Larger catalogs can take a few minutes, and you can leave the page while the sync runs.
When the sync finishes, your blank products appear in the list with their quantity and status. Use the search bar to find products by title or SKU, or use the tabs to filter by All Products, Pushed to Shopify, or Not Pushed.
Click Details on any product to see its sizes and inventory before adding it to your store.

To push a single product, click Sync to Shopify on its row.
To push several at once, check the boxes next to the products you want (or the box in the header to select all), then click Sync to Shopify.
Pushed products are created in Shopify in Draft status, so they won’t be visible to customers yet.
Click Bulk Pricing on a product’s row to pass quantity discounts on to your customers. Check Enable bulk pricing for this product, enter Your sell price for each quantity break, and click Save merchant prices. Set your sell prices above Corporate cost to earn a margin. Your first quantity break becomes the product’s regular price in Shopify.
For full details, see How to Sync Your Products into Shopify.