Pearl Izumi Men's Ultra Thermal Top 100% Polyester Read the care content label on the inside of your garment for specific instructions; use simple detergents with no additives. Our Ultra Thermal Top is a versatile midweight layer that features a soft interior, perfect to wear next to skin or as a performance layering piece. Gear designed and constructed to fit perfectly to the body in motion. The perfect balance of anatomic fit, performance engineered materials and the personal interface between athlete and gear. Our 4 core fabric technologies (Transfer, Barrier, Thermal and Softshell ) create a system that works to help you maintain the perfect temperature for the weather conditions and activity range day in and day out Pearl Izumi product is built to last the lifetime of the garment, and this is how long we will stand behind it. Product purchased from an authorized dealer or retailer is fully warranted to the original owner against defects in materials and workmanship