I have used this for 1 hot day and 2 stormy and cold rides. They do keep your arms colder and also protect you from sun burns (Puerto Rico all year long summer) and they do protect on rides at 70 - 75 degrees with the wind factor, could be lower but, again, Puerto Rico is not as cold as state side. The fabric is true black and when on the arm does not show skin in the light, but its very thin and does not have the plastic strip that could hold your Sleeves but only when on rainy days is proved to be necessary, also, in the picture there is a small logo on the wrist part, that must be a water mark because mine does not came with that. This sleeves are light as air and you can use it on wet/cold/hot rides, you won't notice you're wearing. Also, they don't look cheap.... I will gladly buy a pair down the road. I am a medium large (5'11" 230lbs) rider with a bit above average wide arms and it does fit very well.***No five stars do to the thinner material compared to other brands at the same price level, no plastic band to hold the upper sleeve part, on adverse weather this proved to be a must, the logo in the picture is not really in the sleeves and have to burn some lose threats that were dangling from the seams.