Pearl Izumi Warmers Size Chart The Thermal Lite Arm Warmers are lightweight, packable and perfect for cool days. Their SELECT Thermal Lite fabric provides light warmth and coverage. A seamless construction gives them a smooth, comfortable fit. Features: - SELECT Thermal Lite fabric provides superior insulation in mild conditions - Seamless knit construction stretches to fit - All warmers are sold as a pair - 79% nylon 18% olefin 3% spandex - Made in USA - Last Chance: Discontinued Style