POC Cortex DH Helmet
Here's what other sites are saying:
POC doesn't skimp on details when it designs protective gear, ever. You can see this in the carbon and polycarbonate shell of the Cortex DH Helmet and in its ingenious and one-of-a-kind MIPS protection system. This is a lightweight, supremely ventilated helmet for downhill mountain biking, and it's POC's cream-of-the-crop dirt helmet.