his pair of arm sleeves is made exactly for the purpose of sun protection and cooling. They offer ultra protection for your arm from sun-burnt and UV. Protect wrist joints,Relieve Muscle Fatigue,reduce wrist impact force Reduces pain and swelling, speeds up recovery, also prevent injury With great elastic, they fit perfectly with your arms to reduce the wind resistance when riding thus minimizes arm fatigue and damage. Its high quality Spandex which is ultra thin, sweat absorbent and fast dry constructed by fine craft to keep your arms always cool in hot summer days which ensures a comfortable and enjoyable experience. Actually this pair of sun protective arm sleeves not only for outdoor sports like cycling, golfing, fishing, jogging and basketball, also ideal for indoor activities to stay your arm clean. Stretchy and absorb sweat Good craftsmanship Fabric is breathable and stretchy. Sweat can be discharged form the breathable fabric. Ultraviolet-proof and comfortable Good supporting and buffering effect Main Fabric:Polyester For Sports:Basketball,football,volleyball,tennis,badminton,table tennis,jogging,jump and other sports Color:Black Size :L - Length - 43cm , Down Cir .- 9, Up Cir. 14cm"