Sure, here's a rephrased version of the features and specifications presented as a cohesive paragraph: These arm sleeves are meticulously crafted for both sun protection and cooling purposes. They offer outstanding defense against sunburn and harmful UV rays while ensuring a snug fit with their excellent elasticity, thereby reducing wind resistance during activities like cycling to minimize arm fatigue and potential damage. Constructed from premium polyester, these sleeves are exceptionally thin, adept at absorbing sweat, and quick to dry, ensuring your arms remain cool and comfortable even on the hottest summer days. Designed not only for outdoor sports such as cycling, golf, fishing, jogging, and basketball but also suitable for indoor activities, they effectively keep your arms clean and protected. The sleeves come in a universal size made of polyester, weighing just 50 grams, with dimensions that accommodate a variety of arm sizes: the upper cuff ranges from 13 to 17 cm (5.11 to 6.69 inches), the bottom cuff from 9 to 13 cm (3.54 to 5.11 inches), and a length of 41 cm (16.14 inches).