Express Delivery can be offered in Walmart only as free delivery. Since products with fast and free delivery rank higher compared to other products with standard shipping in Walmart marketplace, we set up free shipping by default for products sold on Walmart marketplace when you enable Express Delivery. 

Walmart will automatically display a “2-day shipping” label on products with Express Delivery enabled for the primary color variant (main mockup) of the product. Other variants of the product can have standard shipping. Typically, products with this label rank higher in search results. When buyers choose the 2-day shipping option using the speed filter, it has the potential to eliminate nearly 90% of the competing offers.

The higher price for these products is justified by the premium service they offer, allowing them to compete based on the level of service rather than solely on price.