The budget carrier is investing in new Kestrel seats - produced by UK-based manufacturer Mirus - which will be fitted in 237 new aircraft in the EasyJet fleet from in 2028.
The innovative design is made from carbon fibre instead of plastic making the seats stronger and slimmer so they add extra space without changing the pitch - the distance between the rows.
The design also allows the passenger to sit further back in the seat - adding to the legroom increase - while they also feature a fixed recline of 22 degrees which means they cannot be pressed backwards by the person in front.
As well as providing a more comfortable journey for passengers, the new seats are said to be around 20 per cent lighter than the plastic alternative - allowing Easyjet to shave around 500 kilograms of weight per aircraft which will help save fuel and reduce CO2 emissions.
EasyJet Chief Operating Officer David Morgan said: “We are delighted to be introducing the Mirus Kestrel seat across our future fleet.
"This investment supports our continued focus on making our operations as efficient as possible, capitalising on small incremental gains that result in meaningful reductions in fuel burn and CO2 emissions.
"On top of the sustainability benefits, the additional legroom and enhanced comfort these seats will provide will also deliver an improved onboard experience for our customers, which we know they'll love."
Ben McGuire, Chief Executive Officer of Mirus, added: "Mirus is incredibly proud that EasyJet, the UK’s largest airline and one of the world’s leading carriers, has placed its trust in us for what represents one of the largest single-model aircraft seat awards ever.
"This landmark agreement marks a defining moment for Mirus and reflects our shared commitment to enhancing passenger experience and comfort, while delivering sustainability and significant operational cost savings through reduced fuel burn and COâ‚‚ emissions."
A press release from EasyJet estimates the new seats will offer a combined annual fuel saving of more than 12,936 tonnes, which is equivalent to around 40,513 tonnes of Co2.
The new seats are also said to have reduced maintenance requirements due to their robust structure and they are approximately 98 per cent recyclable when they do eventually need to be replaced.
