Bontrager's Visibility Thermal Leg Warmers are the perfect take-along for changing weather. Made of thermal fabric for warmth and breathability, they have grippers inside and out to keep them in place, and they're small enough to easily roll up and tuck in a pocket or pack so you're always prepared. The left/right anatomical cut gives you a perfect fit, too. Other key details include reflective accents and zippers for easy on/off.