X-Bionic Running Arm Sleeves

These arm sleeves feel light, smooth, and fit snugly. They are seamless, so nothing chafes against your elbow or armpit. The thumb hole keeps them in place, and the opening at your wrist allows you to see your watch without having to push up the sleeve.

They perform best when the temperature changes during your run. Think of the start of a trail race on a cold morning, a long endurance run that starts fresh and ends warm, or a mountain hike where it cools down at the top. You'll notice the difference after the first few kilometers: as soon as you warm up, you roll them down to your wrists or put them in your pocket, and on the next descent, you pull them back up. This way, you run all day in a short-sleeved shirt without cold arms.

If in doubt, consider the weather and your fit preference. Due to the compression, they fit really snugly, so if you prefer a bit of room, a loose long-sleeved shirt is more comfortable. They are thin and not waterproof, so you will need a jacket in frost, wind, or rain. However, they are ideal for changing conditions and chilly starts.

In short: lightweight arm warmers for runs that start cold and end warm.