Upper arm sleeves cover the section between shoulder and elbow, which is a different job from a full-length compression sleeve — lighter, less restrictive, and easier to wear under a t-shirt without bunching at the forearm.
The compression fit provides gentle support and a smooth line under clothing, and the stretch knit stays in place through overhead movement rather than rolling down. Breathable fabric keeps them from getting hot over the bicep during a session.
Sold as a pair. Suited to training, sport, or wearing under everyday clothes for a smoother silhouette.