Features: Elastic arm sleeves: Wrist circumference is approx. 16 to 28 cm, upper arm circumference is approx. 22 to 34 cm, the length is approx. 37 to 50 cm, suitable for most people. Soft and breathable: Made of ice silk material, which is breathable and slow in sunshine warming up, and its sweat absorbing ability is pretty good as well, suitable for usage in summer time. And sleeves of good elasticity can help to protect your arms from the cruel UV radiation in summer and prevent pulled muscle while doing outdoor activities, sports, etc. Wide applications: These arm cooling sleeves can be applied when training, racing, running, cycling, fishing, driving, golfing, jogging, climbing or having other outdoor activities. Specifications: Material: ice silk Colors: as pictures shown Notes: Please allow 1 to 2 cm error due to the elasticity of arm cooling sleeves.