In March of 2012 Southwest began reconfiguring their 737-700 fleet to increase their seating capacity from 137 seats to 143 seats. These newly reconfigured aircraft will also feature the new Evolve Interior with silmline seats.Their Evolve Interior is an eco-friendly design that is part of Southwest’s commitment to be a “green” airline.Southwest has retained the “Innovator II” seat frames and …
https://www.seatguru.com/airlines/Southwest_Airlines/Southwest_Airlines_Boeing_737-700_new.php