PREMIUM MATERIALS - The sleeve arms are made of 90% nylon and 10% spandex. It's smooth, cool, and has strong UV resistance and moisture-wicking properties. Cools your arms quickly even when you're exercising.MULTIPURPOSE - If you enjoy outdoor activities like basketball, football, football, golf, baseball, running or biking, or you do driving, landscaping or other outdoor work, our Ice Silk Sun Protection Sleeves will bring Your maximum comfort. arm sleeves, perfect for any kind of outdoor sport or activity.HIGH-EFFICIENCY SUN PROTECTION - cooling UV protection sleeves are made of UPF50+, which can effectively block more than 98% of UV rays even in hot summer, protecting arm skin from sunlight.QUALITY ASSURANCE - you can buy with confidence, if you have any questions when using our arm sleeves, please feel free to contact us, we will give you a satisfactory answer within 24 hours.ELASTIC AND COMFORTABLE ARM SLEEVES - Our sleeves are stretchy enough to fit most arms comfortably without leaving marks on your arm, suitable for most men or women, don't worry about slipping off your upper arms.