MENTAL NOTE: Sure, it's cool to feel the wind in your hair and the sun beating down upon you, but it's less thrilling to end a bike ride or snowboard session with a concussion, or worse. Take a tip from mothers around the world and protect your noggin with a stylish helmet from Bern. Shaped to resemble the sleek look of bikers' skull caps, they provide ample protection for men, women and kids while skiing, snowboarding, bike-riding and skating without the rather nerdy bubble effect, and they have removable liners to accommodate a variety of weather conditions. GET IT: On sale starting at $31.93. REI, 5556 Copley Drive, Kearny Mesa, (858) 279-4400.