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  Old uniforms were usually made of a thick amterial like wool
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  Helmets are mandatory
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  Helmets get designs
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  San Diego comes out with beautiful new uniforms wheras Denver somes out with one of the most ugliest uniforms ever.
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  The 70's was host to one of the best uniform decades ever. Teams mixmatched colors and facemasks were the norm now.
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  The uniforms we see today start to shape. No more expansion teams, and many teams such as the Baltimore Colts and the Oakland Raiders move to different cities.
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  Jersey sales became the biggest merchandise on the market.
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  The Houson Texans enter the league and throwback uniforms are allowed to be worn up to three times a year. Wearing throwback uniforms on Thanksgiving games become a tradition.
