Stay toasty during winter runs with the smart layering system used in these outfits. Even if you misjudge and overdress, the layers can be altered or tied around your waist to maintain the perfect temperature.
 Brooks Utopia Thermal Hoodie II ($100, Brooksrunning.com)
All the makings of an effective mid-layer: a hood, zipper and thumbholes for easy temperature adjustment, and a comfy fuzzy interior. Comes in six colors.
 Craft Warm CK Wool Roundneck Blackberry ($120, Shop.craftsports.us)
This plush, seamless base layer keeps you warm even while wet, and its wool blend means it will stay odor-free.
 Sugoi Subzero Zap Tight ($100, Sugoi.com)
Sugoi’s thickest tight for the coldest winter day, with reflective markings and an interior key pocket.
 Saucony Sonic Shift Print Jacket ($100, Saucony.com)
Although the fun print is hard enough to miss on its own, the blinking built-in light (recharged via USB) provides extra safety reassurance.
 Saucony Mod Striped Headband ($15, Saucony.com)
Added grippers on the inside make this simple headband stay put on any tresses.
 Craft Running Hybrid Glove ($25, Shop.craftsports.us)
Swap from mittens to gloves as you heat up.