Nolan N104 Flip Up Convertible Motorcycle Helmet - Bluetoothy Equipt

Original price: $530
Made in Italy
Notes from review page:
It's widely regarded as very comfortable by users.
The inside of the helmet is treated with antibac and is fully removable for washing/cleaning. If you look inside, you can see the ventilation channels and you can also see cut-outs for the stems of glasses (so they're not pressing against your head) and for Nolan's bluetooth intercom.
Reports are that the Nolan's a comfortable place to be and has decent ventilation for hot weather riders. For those of us in colder places, the vents do a decent job of keeping the visor mist free too. There's a chin vent and, unusually, separate forehead vents, both operated by the one slider. Click the slider one position and the top vent opens, scooping up air and directing it over the head to exhaust via the vents at the rear. Move it one more notch and it opens the other forehead vent just above the visor. This one does a grand job of directing air over the visor too.