Tame temperature swings with some arm candy. Pocket them when it’s hot, pop ’em on when it’s chilly. Our top editor-tested picks.

PHONE-FRIENDLY

Lululemon In a Flash Arm Warmers
With a built-in phone pocket, these can serve double duty as a layer of warmth and a phone holder. We also enjoyed the added coverage from thumbholes and visibility from reflective seams that wrap around the arms. Make sure you get a snug fit if you plan to use the phone pocket—it can weigh down the sleeves a bit, causing them to slip on longer runs. $38, lululemon.com

SLIP-FREE FIT

The North Face No Hands Arm Warmers
The comfiest of the bunch, these moisture-wicking sleeves, which feature flat-lock, chafe-preventing seams, stay in place securely with bands of silicone without bunching. In addition, they offer UPF 50 sun protection, and they come in a variety of fun prints and colors to add a bold statement to your run closet. $30, thenorthface.com

VISIBILITY POINTS

Brooks Dash Arm Warmers
You won’t be missed (even in low-light conditions!) in these neon-colored arm warmers, which stay on with silicone grippers around the biceps and feature thumb holes to cover your wrists. The fabric, a blend of polyester and spandex, is exceptionally soft, moderately sweat-wicking and offers UPF 45 sun protection. Note: They run large. If you’ve got thinner arms, size down. $28, brooksrunning.com