Reebok Calvin Johnson Detroit Lions Blue Authentic Jersey Size 52 All letters, numbers & team logos sewn & stitched onto jersey Sleeves/Yoke: 100% 6-oz polyester metallic plus dazzle, duratalic, or lycratalic (varies by team) Collar/Cuffs/Sleeve Inserts: 100% 10-oz polyester rib knit (specific to team) NFL Equipment patch sewn on the bottom of front collar or fabric insert Officially licensed