Bamboo Yarn-kun arm cover is stretchy and comfortable. A popular product that feels cool when worn and feels like silk. For Use: For office work... In a hot room in the summer, sweat your arms and hands to prevent your documents and desk from stickiness. For packing and packing... Prevent your arms from scraping and cutting with cardboard. Cycling, car driving, gardening, etc. UV protection rate of 98% - 99% for UV protection. It can also be used for cycling or playing guitars. Bamboo yarn arm cover is perfect for all occasions including spring, summer, autumn, and winter.