Compression Arm Sleeves - UV Protective, Cooling Effect, 3D Seamless Design 80% Polyester /20% Spandex Imported UV Protection - It protects your arms well from the sun especially for those who are in sunny area Cooling Effect - Because it has cooling effect, you'll feel cooler when you wear it. Breathable Material - Its breathability helps your arm dry faster! 3D Seamless Design - This feature allows you to feel comfortable because of its ergonomic structure. Size - One Size / 4" Top, 15" Long, 3.5" Bottom