Finnair will begin installing fully-flat business class seating across its long-haul fleet next month.
The carrier will start the 29 million euro (£24.2 million) upgrade in January and it is expected to have been completed by autumn.
Every long-haul jet in its fleet will have its business cabin renovated, with the exception of three older aircraft which will be the first to be replaces when Finnair receives a consignment of 11 A350 XWBs in 2015.
The Zodiac Seats UK Vantage model seats are already in use on the airline's four newest Airbus A330s.
They are designed to provide a fully-flat bed of up to 79 inches (200 cms), while shoulder room measures 23 inches (58 cm).
The fully adjustable seats also come with an individual reading light, adjustable head rest, mood lights and a range of inflight entertainment options.
Anssi Komulainen, Finnair's senior vice president, customer service, said: "The full flat experience has been very well received by customers in business class.
"We believe that the key to Finnair's success in a very competitive market is to differentiate on service, and this substantial investment in the comfort of passengers helps us in this long-term aim.
"Full flat seats are the new standard for quality-conscious customers, and for Finnair."
It recently emerged that LOT Polish Airlines will lease one of its surplus B787s complete with crew to Finnair, as Business Traveller first reported last month (see news, November 25).
Graham Smith