Print-on-demand stores sell finished products, but production uses components: blank shirts, transfers, patches. Shopify tracks only finished stock, so merchants reconcile components manually in spreadsheets. Pressly links Shopify variants to their blanks and transfers, automatically deducting component stock when orders come in. Define a blank once and reuse it across every product that uses it. Includes low-stock alerts, multi-location sync, production locks, and pick lists.