The Capo Roubaix arm warmers are a simple design using quality materials that function well. And that is exactly how we like are arm warmers served, simple. There are 3 panels. Fore arm and upper arm, then the elbow which is stitched in anatomic fashion to make these feel like an extension of your arm. Thermo Roubaix fleece material is used to keep you warm. It has hollow core fibers for heat retention and has a soft-as-felt feel against your skin.