Pearl Izumi Men's Ultra Inside-Out Short Sleeve Zip Top Main Body: 70% polyester 30% S.Caf polyester/UPF 50+ Side Panels: 62% polyester 38% S.Caf polyester/UPF 24+ Imported Read the care content label on the inside of your garment for specific instructions; use simple detergents with no additives The Ultra Inside-Out Zip Short Sleeve top is ideal for all seasons; Wear it alone for warm weather or pair it with arm warmers for cool weather The perfect balance of anatomic fit, performance engineered materials and the personal interface between athlete and gear A clothing system that works to help you maintain the perfect temperature for the weather conditions and activity range day in and day out