I have several pair of "sun sleeve" type of arm warmers. Here in Australia, skin damage from the sun is always a concern and during the summer, it can be a pain to find and wear a good sunscreen (although I have found a good one now) all the time ... so I do tend to wear long-sleeved jerseys or the summer weight arm warmers.

However, when the temperature gets up around 30C, those arm warmers start to get too hot for me.