Knee defenders: what are they and are they really necessary?


Yesterday a United Airlines plane had to be diverted and two people were kicked off after they started arguing over knee defenders. What ARE knee defenders, though, and why are they a problem?

Jarod & Jennifer Davis/Flickr



A plane was diverted mid-flight after two passengers began to argue over a set of knee defenders. But what are knee defenders and why are they so controversial?


A knee defender is a plastic gadget that you clip onto the meal tray of the airline seat in front of you, to prevent the person sitting there from reclining. This is a pretty good explanation of how it works. It's basically the most passive-aggressive product ever created.


The manufacturers have recognised that this may be a problem, so they include a handy 'courtesy card' to wordlessly display to your fellow passengers:


'I realize that this may be an inconvenience. If so, I hope you will complain to the airline. Maybe working together we can convince the airlines to provide enough space between rows so that people can recline their seats without banging into other passengers.'

So that's alright then.


Are they even legal?

Surprisingly, the FAA haven't banned knee defenders, but flight attendants will often ask people to take them off as they 'interfere with plane equipment'. Which is technically true, we suppose. But mostly they really irritate people.


How much leg room do you really get?

Everybody complains about feeling cramped while flying, so SeatGuru.com has a useful seat pitch chart for you to compare legroom on airlines.


It's worth noting that UK regulations stipulate that there should be a minimum of 26 inches between each seat (seat pitch). Here's a useful round-up of the best and worst for seat pitch:



If you fly long-haul in Economy, you might want to avoid Southern China airways as it's listed as having from just 29 inches of room. British Airways' Euro Traveller is not much better with just 31 inches on most of their planes.


The top airlines to go with in Economy are United or American Airlines. These have a whopping 36-37 inches of legroom.


For Premium Economy - or Economy Plus as some airlines call it - Condor Flugdienst and Gol (we've not heard of them either) are stingy on the legroom, with just 31-32 inches. According to SeatGuru, the best is OpenSkies which has a generous 47 inches of legroom.


If you prefer flying Business, the ones to avoid are Brussels Airlines and Lufthansa as they only give you a paltry 30 inches. The best in this case is Thai Airways with 87 inches of room.


Are knee defenders necessary?

This question has sparked an emotional debate (on both sides) on airline messageboards, social media and newspapers since knee defenders were invented. It's basically an escalation of the cold war that's always existed between airline passenger and adjacent airline passenger.


Our take? Everybody should be able to recline, as this is a specific function of the seat you buy. Why not try asking politely before you do it though.


However, if you don't mind risking a punch-up with fellow passengers, go right ahead and clip on those knee defenders.



The pilot has now been hailed a hero after he managed to land the light aircraft in a field despite the mid-air drama


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