Formula One is a sport with ever-changing rules and regulations, whether they be technical or related to the competition itself.
However, one particular measure has divided opinion within the paddock ahead of the 2018 season, even though it is a safety feature.
After much deliberation, the 'Halo' device is finally part of F1's requirements as the FIA looks to protect the drivers from flying debris that could cause serious damage.
It may not be aesthetically pleasing to some, but the Halo is an undoubted step forward for a sport that has endured more than its fair share of tragedy in the past.
With the opening race of the season less than a week away, we take a deeper look into F1's new safety device and what the reaction has been.
WHAT IS THE HALO?
The Halo is a structure that sits above the car's cockpit to protect the driver's head from flying debris.
Made of sculpted titanium and weighing around 7kg, the Halo can withstand approximately 12 tonnes – making it the strongest part of the 2018 F1 cars.
A single pillar supports the structure in front of the driver, with a hoop above the cockpit that is mounted to the car's chassis.
The device is mandatory for all cars, with F1's bosses hoping it will allow the drivers to push the limits further under improved safety.
WHY WAS IT BROUGHT IN?
Formula One's governing body undertook a "multi-year" study into improving cockpit safety after deeming the drivers were under an "ever-present" risk while unprotected.
The FIA was keen to prevent a repeat of Felipe Massa's accident at the 2009 Hungarian Grand Prix, when a spring from Rubens Barrichello's Brawn struck him on the head and left him in hospital with a fractured skull.
Mercedes proposed the Halo concept in 2015 and it has been undergoing tests ever since, with the initial prototype a steel structure.
The FIA looked at 17 case studies of serious F1 accidents and deemed that Halo would have resulted in a beneficial outcome in 15, while the other two produced a neutral finding.
WHAT WERE THE OTHER OPTIONS?
A curved, clear shield design produced by Italian manufacturer Isoclima was also considered before the Halo was selected.
Ferrari's Sebastian Vettel tested the shield at the 2017 British Grand Prix but was unconvinced, citing poor visibility and buffeting from the wind, while he also complained of dizziness.
"Forward vision is not very good," he said at the time. "I think because of the curvature, you get you get quite a bit of distortion, plus you get quite a bit of downwash down the straights pushing the helmet forwards."
Vettel's comments may have contributed to Halo being implemented but expect further designs to pop up in the near future as the teams get to grips with the contraption.
HOW DOES IT AFFECT THE CARS?
There were fears that the pillar mounted in the driver's eyeline would hamper them.
It has caused more of a problem for the designers, with its presence meaning airflow needs to be redirected to ensure there is no loss of performance.
Another challenge is getting into and out of the cockpit, with the drivers having a smaller gap to slip into their seat.
Toro Rosso's Pierre Gasly has already encountered problems with that, the device ripping his racesuit during an early testing session in Barcelona.
"It's just a big mess to get in the car and out," he said on February 27. "I think my suit is already broken. We'll have to ask for many suits this season.
"It's only the first day and I have many holes on the back."
Can't wait to scratch my suit again tomorrow for Test 2 in Barcelona. Hopefully we can get some good running again & keep improving! pic.twitter.com/iImQChoSOY— Pierre Gasly (@PierreGASLY) March 5, 2018
WHAT HAS THE REACTION BEEN?
It's fair to say the reaction after the first week of testing was mixed, although many of the drivers have said the device does not hamper their vision on track.
The aesthetics have caused more division, with some not minding the new addition and others barely able to control their frustration.
Here are some of the best quotes...
World champion Lewis Hamilton: "I think after a few races, we'll forget it's even there."
McLaren's Fernando Alonso: "Absolutely no problem so far. The biggest thing is getting in and out. So far I think the Halo is not a problem for driving."
Hamilton's Mercedes team-mate Valtteri Bottas: "In the car when you are sitting there you only see the centre pillar and a small part of the wider one but you are not looking there anyway. It's straight ahead. It's a small thing in the middle and that's it, I'm completely used to it and it's fine."
Ferrari's Kimi Raikkonen: "It's not an issue."
Lance Stroll, Williams: "It's going to save lives, no doubt. It's there to protect us, I'm in favour of it."
F1 legend Alain Prost: "I don't like the Halo at all. For a lot of reasons. For aesthetics, it changes the nature of the single-seater car. But if it brings a little more security, that's fine. Now that's here, we have to deal with it. But it's not something I appreciate. We can always improve things. But we must not distort what is Formula One. I think it's a little dangerous to want the risk to be zero when we're motorsport racing."
Nico Hulkenberg, Renault: "The Halo, it's there. We'll race with it, it's not really disturbing me as a driver, so not much more to say. I don't think it's that necessary in Formula One but I don't make the rules. It's decided now anyway and we will race with it."
Mercedes boss Toto Wolff: "I'm not impressed with the whole thing, and if you gave me a chainsaw I would take it off."
Haas' Danish driver Kevin Magnussen: "It's very annoying. Ugly. Difficult to get into the car, difficult to get out of the car, difficult to get the steering wheel on and off, just awkward and annoying."
|Brotherly g-love! Tommy Fury follows Tyson into the pros|
|Ozil´s international retirement can help Arsenal - Emery|
|If you sack Lopetegui, you have to sack us all – Isco|
|Lopetegui defiant amid Real Madrid sack reports|
|Sri Lanka spinner Herath to retire after Galle Test|
|Ronaldo returns for Old Trafford welcome amid disquieting noise|
|Garcia claims third Andalucia Valderrama Masters title|
|Ex-England international Waldrom retires|
|´Massive personality´ Hart can lift Burnley, says Kompany|
|Liverpool felt wrath of ´emotional´ Klopp, says Shaqiri|
|Reid: Jenkins capitalised on Kaepernick movement|
|Manchester United v Juventus: Ronaldo out to end dismal scoring record against Mourinho|
|Injured Ribery to miss Bayern´s clash with AEK|
|Wilshere would have stayed at Arsenal under Wenger|
|Mahomes stars again as Chiefs crush Bengals|
|Bolt must accept ´much less´ to join Mariners, says A-League chief|
|Klopp compares Liverpool to dog without favourite toy|
|Young leads Hawks to first win, Thunder fall in Westbrook´s return|
|Spalletti hits out at physical Milan – I had three players asking to be replaced|
|Cowboys, Ravens lose after missed kicks in final seconds|
|Hernangomez secures Nuggets´ win over Warriors with last-second block|
|Hasler returns to Manly on three-year deal|
|Sarri: Chelsea fans must respect Mourinho|
|Ronaldo learnt from Scholes – Pjanic praises Juventus star|
|CA dismisses spot-fixing claims|
|WATCH: Will Ferrell leads chants with LAFC fans|
|MLS Review: Galaxy on track for play-offs as Timbers, DC clinch spots|
|Elliott secures win at Hollywood Casino 400|
|Thunder´s Westbrook makes season debut against Kings|
|Saints beat Ravens after Tucker misses extra point|
|Rondo, Paul and Ingram banned after Lakers-Rockets fight|
|Saints QB Brees reaches another historic milestone|
|Biglia: VAR should have checked Nainggolan tackle|
|Gattuso not blaming Donnarumma for derby defeat|
|Seventh in Mexico will secure Hamilton´s fifth world title|
|Rooney fires DC United into MLS play-offs|
|Alonso slams ´amateur´ F1 rivals after latest crash|
|Spalletti fears lengthy Nainggolan absence|
|To the Max! Verstappen destroyed shoe fending off Hamilton|
|Icardi delight after Donnarumma error gives him another derby winner for Inter|
|Guardiola: Versatility the key for Stones|
|Vettel frustrated as mistakes continue to hamper title challenge|
|ECB refutes spot-fixing claims against England players|
|I thought we would do better - Hamilton queries Mercedes strategy|
|Inter 1 AC Milan 0: Icardi settles derby with dramatic late winner|
|Hamilton denied title party as Raikkonen wins in Austin|
|Patriots RB Michel out against Bears with gruesome knee injury|
|Kohli hails Rohit partnership after comprehensive India victory|
|Silva downplays his role after Everton super subs seal victory|
|Injured Bairstow out of final white-ball matches in Sri Lanka|
|Pliskova feeling confident after impressive start in Singapore|
|Big-hitting Imrul rescues Bangladesh in opening ODI|
|Leinster suffer late defeat at Toulouse, Newcastle snatch dramatic victory|
|Chargers pip Titans to dramatic London win|
|Everton 2 Crystal Palace 0: Substitutes Calvert-Lewin and Tosun clip Eagles´ wings|
|Thunderstorms push Andalucia Valderrama Masters into reserve day|
|Edmund masters Monfils to claim maiden singles title|
|Kohli and Rohit fire India to comprehensive ODI win|
|Manchester United didn´t play - David Luiz blasts Mourinho tactics|
|Svitolina out to silence ´haters´ in Singapore|
|Emre Can facing surgery on thyroid problem|
|Tsitsipas claims maiden ATP crown in Stockholm|
|Mariners boss Mulvey knows nothing of Bolt contract offer|
|WATCH: Vinicius Junior scores free-kick - then sees red!|
|Gronkowski ruled out of Bears clash|
|Khachanov enjoys home comforts with comprehensive Kremlin Cup win|
|Isner wants Wimbledon tie-break rule named after him|
|Hummels lauds ´outstanding´ Lewandowski|
|Liverpool´s defensive improvement no accident – Gomez|
|Pliskova overpowers defending champion Wozniacki in Singapore|