I'm currently rocking a kask zenith non vented hardhat. I've had it for years and It's about due for an upgrade. 3m has a new hardhat, the x5000. Looks pretty interesting. I'd love to hear everyones experiences with what they use and why they like what they have. The kask has its flaws in my opinion. My safety glasses push against my head because of where the suspension sits. You can't just buy a new suspension for it, which is a bummer compared to the petzls. My earmuff slots are lose and will occasionally result in a dropped muff.