The Pro Racing Arm Sleeve is a 2-in-1 sleeve that offers both compression & UV protection for your arms for all sports including running & cycling during & post exercise The Pro Racing Arm Sleeve is 100% seamless using a special thermo-regulated knit to protect from wind-chill whilst remaining breathable with sanitized treatment to prevent the growth of bacteria & naturally fight odours The Pro Racing Arm Sleeves features progressive compression combined with a 360 degree shock absorber to reduce the vibrations on muscles veins & joints & accelerate venous return which enhances recovery & improves performance by increasing oxygenation to muscles The Coldblack treatment reflects the UV-rays to reduce heat & perspiration & provide UPF 30 protection