DMR has the resources to fulfill your package fulfillment needs. We have the resources to assemble, kit, and ship your packages. Ground Advantage is a commonly used USPS shipping service. It's a ground option that is very similar to First Class Ground Package/Parcel service, which they renamed to “Ground Advantage” back in July 2023. The USPS Ground Advantage is a great option for shipping packages over 16 ounces whether it is a box, a stay flat envelope, a tube or even a padded or softpack envelope.