Doesn't really seem like a big deal. The rule is they can choose to use it or not. I'm sure if the cooling jackets improve to the point that they are making a difference, then their teams would start making them use the vest, regardless of any further rule change.

Unsurprising that Leclerc is a glass-half-full kind of guy. You'd have to be to still be at Ferrari.

Glad Williams found one thing to achieve engineering success in. I think it'd be better for everyone that it was the car though.

Seems like something that the FIA should get developed by an independent company. I want to see the fastest drivers on track, not the drivers with the highest heat tolerance.