Chilly Fall mornings mean wearing extra layers. If a long-sleeve is a little too much, go for a pair of Smartwool Arm Warmers ($25). Slip them on before heading outside, and when you start to warm up, just slide them off, roll them up, and stick them in your pocket. Made of the softest merino wool and seamless construction, they'll be so cozy, warm, and comfortable, they'll inspire your Fall workouts. Check out all five colors, but I like the light blue ones best.
—Jenny Sugar, associate editor