UPF 50+ Protection Arm Sleeves: Say goodbye to reapplying sunscreen every 10 minutes! Our UPF 50+ arm sleeves for men women are made of high-quality soft nylon, can really block up to 98% of harmful UVA and UVB rays, can block harmful sunlight. Cool Wearing and Breathable and Quick Drying: Wearing arm sleeves for men and women work in hot days will have an instant cooling help by 2-3C, making you feeling cool and comfortable. Stretch Fit & Seamless Comfort & Anti-Slip: Our arm sleeves are made of four-way stretch fabric. The stretchy nylon fabric stretches to over 4 times its length, no matter your arms are thick or thin, you won't feel uncomfortable due to strangulation marks. Our arm sleeves fit your arms snugly and are less likely to slip off, while also being more comfortable and not too loose to detract from the wearing experience. Anti-Pilling & Color Fixing & Long-Lasting: Our arms sleeves for men women are anti-snag and anti-pilling treatment, which is wear-resistant and long sustainability. Our arm covers are color-fixed and will not fade as long as they are not soaked for a long time.