About the 49ers and Raiders jerseys: These are made of the heavy mesh material used in the older years of football. Each has a double thickness nameplate sewn onto the shoulder area which also has double thickness. All the letters and numbers are sewn on "tackle-twill." These jerseys are based on the old Sand-knit and Wilson Sporting Goods design. There is no manufactures' name on the jersey as these companies no longer exist or do not have the NFL license to show their name. These jerseys are made of the most authentic materials available today.