Fit Advice from Nike: Men's Nike Limited Jerseys generally fit true to size. We recommend ordering one size larger than you normally wear for a looser fit or up two sizes if you plan on layering underneath the jersey. Material Breakdown:100% Recycled Polyester. Authentic NFL shield at collar.Satin twill woven jock tag at bottom of jersey. Washing Instructions: Machine wash & tumble dry on low for best results. Perfect for any San Francisco 49ers , Nick Bosa or football fan!