If your helmet feels like a bowling ball, you may opt to leave it in the car. This is why we like Giro’s new women-specific Envi MIPS (and the unisex Grid MIPS). At a mere 14.1 ounces—about the weight of a paperback book—it feels barely noticeable on your head. That doesn’t mean it sacrifices safety, though. It sports a proprietary version of MIPS: two layers of light, impact-reducing foam that rotate independently of each other to protect the brain from linear and rotational forces without adding much weight or bulk. Sixteen well-placed vents mean the lid is suitable for uphill endeavors. Bonus: the sleek magnetic closure on the chin strap is easy to click open and shut with gloves.

Read the full review on OutsideOnline.com or pick up the new Outside Winter Buyer’s Guide.