17 Editor-Approved Running Essentials — From Therabody to New Balance

Sharper Image Hot + Cold Back Wrap ($21)

I'm always surprised by how well this back wrap works for its low price. What I like to do is keep it in the freezer for an immediate cooling sensation post-run. Then, hours after I've used it and it's warmed up, I place it in the microwave to warm my lower back, which can be a common problem area for runners. What I really love about this product is its versatility — you can flip it to the darker gray side for less intense temperatures, and the strap is adjustable so you can tighten it for compression or even use it on other parts of your body.