Depending on where you ride, you might wear a heavy-duty jacket a few times a year, but a long sleeve jersey like our RBX Expert Long Sleeve Thermal Jersey has the potential to be worn on every ride. It's designed to both insulate and manage moisture buildup, keeping you cozy. - Fabric Content: MAIN: 94% Polyester, 6% Elastane; OTHER: 85% Nylon, 15% Spandex - Thermal fabrics feature remarkable insulating properties, astounding levels of breathability and moisture management, and a lightweight, brushed back fleece that's soft against the skin. - Three back expansion pockets provide plenty of storage for your ride essentials and electronics.