New Balance Men's NBx Emissive Long Sleeve Top 91% Polyester/ 5% X-Static Silver Yarn/ 4% Elastane Imported 91% Polyester, 5% X-Static Silver Yarn, 4% Elastane; machine washable - line dry X-Static material provides extreme moisture wicking, anti-microbial treatment and thermodynamic properties Front and Back Reflectivity Machine wash with cold water, line dry or lay flat to dry Imported