Nico Hulkenberg has admitted that he is not among those who support the closing of the cockpits in Formula 1.
It is believed that F1 is close to adopting the so-called 'halo' concept for 2017, to reduce the risk of head injuries.
GPDA chief Alex Wurz had claimed that the initiative has the full support of the drivers, but Hulkenberg said: "For me it's a personal thing, but I just think Formula 1 cars should remain open."
Asked if he simply doesn't like the look of the 'halo', he added: "No, nothing like that. I just think that in general, open-wheel cockpits should be open."
Hulkenberg won Le Mans with the closed-cockpit Porsche in 2015, but he explained: "That's something else. Prototypes have always looked like that.
"Single-seaters were always open and they should stay open."
Force India's Hulkenberg finished tenth in the 2015 drivers rankings.