Cool Wristlets Skin Cooling UV Protect Arm Sleeve 2 Pcs Set Material:spandex ,it's flexible and adjustable It suit for different types sports ,such as basketball/outdoor riding /volleyball/hiking/running /golf and so on ,protect the arm form the cruel UV radiation in summer and prevent pulled muscle while doing outdoor activities, sports, etc. It's breathable ,make your arm feel cooling It's anti-slip ,inside it with the silicone strip effectively prevent shedding COOLING MATERIAL: high quality soft fabric (90% nylon and 10% spandex) can block up to 100% harmful UV rays, avoid sunburn, ensure zero pilling, excellent comfort, good breathability, high elasticity and excellent performance. Moisture absorption and sweat release, hand washing is recommended. SUIT FOR ALL OUTDOOR&INDOOR SPORTS: With this ice sleeve, you can go hiking, running, cycling, picnic, hiking, etc. Even if the sun is big, your skin will still be protected by this ice sleeve. UNISEX: This ice sleeve has a variety of colors, suitable for men's colors, but also for women's colors, do not worry about the size problem, it has a very good elasticity