- SIZE OPTIONS: Available in three sizes to suit your needs: - Medium: 18.5 x 10.2 x 7 inches (fits arm sizes 10.2 to 11.8 inches) - Large: 18.5 x 11 x 7.5 inches (fits arm sizes 11 to 13 inches) - Extra Large: 20 x 11.8 x 7.9 inches (fits arm sizes 11.8 to 14.2 inches) - UPF 50 PROTECTION: Protect your skin from harmful UVA and UVB rays with our UPF 50 technology. These arm sleeves block over 99.8% of sun exposure, making them ideal for outdoor activities like running, golfing, cycling, driving, fishing, or any extended time in the sun. - BREATHABLE COMFORT: Made from high-quality polyester, these cooling arm sleeves are designed for breathability and comfort during hot summer days. They are perfect for sports such as baseball, volleyball, basketball, and football, allowing you to focus on your performance without overheating. - VERSATILE USAGE: Ideal for summer protection, these sleeves also serve as stylish accessories for various occasions, including parties, Halloween, bars, street dancing, stage performances, photo shoots, cosplay, and festivals. They make a thoughtful gift for family and friends. Experience superior sun protection and comfort with our versatile arm sleeves, designed to enhance your outdoor activities and keep you cool.