with Polaris branding, with a 2-2 seat configuration on the 757s and 2-1-2 configuration on the 767-400ERs. Polaris passengers check in at separate counters and can use priority security screening where available. In-flight services include pre-departure beverages, table linens and multi-course meals designed in partnership with Charlie Trotter-affiliated chefs via the airline's partnership with the Trotter Project. Passengers are also given priority with boarding and baggage handling and access to the United Polaris Lounge where available, as well as the United Club and partner airline lounges. All Polaris Business seats recline 180 degrees into a full flatbed, all seats face forward. Other domestic routes, especially hub-to-hub service and certain non "United p.s." transcontinental flights, may see internationally configured aircraft with Polaris seating for operational reasons (such as transferring international aircraft from one hub to another or high demand). While the physical seats and entertainment are the same as on international flights, the service, catering and other amenities are the same as in domestic first class. Unlike routes marketed as United Business, these flights are eligible for Complimentary Premier Upgrades. Premium Plus is United's premium economy product, featured on most widebody international aircraft. Premium Plus seating offers more space, comfort and amenities compared to United Economy or Economy Plus, and offers upgraded dining on china dinnerware, free alcoholic beverages, a Saks Fifth Avenue blanket and pillow, an amenity kit and more. The first aircraft with these seats were flying in mid-2018, and the full service launched in 2019. During the interim period, these seats were sold as part of Economy Plus. These seats can be found on almost all widebody aircraft with Polaris seats, with a 2-2-2 seat configuration on Boeing 767s, 2-3-2 on 787s, and 2-4-2 on 777s. Domestic routes, especially hub-to-hub service may see internationally configured aircraft with United Premium Plus seating for operational reasons. Premium Plus seats are sold as Economy Plus seats. While the physical seats and entertainment are the same as on international flights, the service catering and other amenities are the same as in Economy Plus. Transcontinental United premium transcontinental service is offered on transcontinental flights between Newark and Los Angeles or San Francisco and between Boston and San Francisco. Previously branded as p.s. (short for "Premium Service") when initially launched in 2004, through 2017, these flights utilize primarily Boeing 757-200s, with 180-degrees-flat Polaris seats. The premium cabin also features international-style catering, while all seats