My PGA pro gave me a pair of the new Foot Joy Performance Sleeves to evaluate.
The form (ribbing in the elbow area), fit, and function are great. I have worn these for three days. Here in Houston this week the temperature has been in the upper 90's with heat index in the 103 range. Some may think they are hot but with the moisture wicking and airflow across the arm I get a cool feeling. They also work as a sweatband preventing moisture from rolling down to the hands. In addition the UPF 50 protects my arms without sunscreen. I prefer these over the " swoose" version.