giro snowboard helmet womens Era MIPS Women's GIRO CEVA MIPS is a womens winter protective helmet in matte black Giro Avera MIPS Helmet Matte

Timbuk2 offer it up as 'All you need for a day cycling in the wine country or trekking through the Headlands is this sleek bike seat accessory that will fit all your essentials like your ID, power gel, keys and a 20 spot.' On this description more tourer than road cyclist, but for a commuter it would work very well (although working out how to fit some lights onto the bike with this in place could be a challenge)

they are great motorcycle helmets

A totally customizable helmet where you could have an image of your won head printed on it

The small portrait backpacks size makes it perfect for the shoulder strap add-on

Generally, the rougher surf the better