①. Sun Protection from UV Rays: Sun protection sleeves with UPF 50+ protection technology, providing effective UV protection that can block more than 98% of harmful UVA and UVB rays to give your hands all-round protection from UV rays. ②. Cooling and Comfortable: These cooling sleeves are made of microfiber material (90% polyester and 10% spandex), which provides breathability and comfort in hot summer. They absorb sweat and evaporate moisture, so your hands are fresh all day long. ③. Seamless and Durable: The compression sleeves are made of delicate fabric and sewn. The fabric is reinforced and does not pill or tear even after long washing. One size fits most. The natural sleeve length for men and women is 15 inches, and the maximum stretch is 47 inches. The arm circumference is 3.7 inches (9.4 cm), and the maximum stretch is 8 inches (20.4 cm). They are durable and stretchy, suitable for people of all shapes and sizes, both teens and adults. ④. Wide Application: Ideal for all sports and outdoor activities. Great skin protection when running, golfing, driving, cycling, fishing, jogging, gardening, playing football, basketball, tennis, etc. In addition, the black color is suitable for covering up tattoos.