Here's a press release from the Seattle Seahawks officially announcing the team's new uniforms, which includes a description of the changes.
It's worth a look.
Highlights of New Seahawks Jerseys
*Colors: College Navy, Action Green, Wolf Grey
*Modified color scheme mirrors colors of the Pacific Northwest wilderness
*Jersey incorporates graphics inspired by northwest coastal Indian art
*Broad chest graphic outlining the shoulders echoes the stance of a Thunderbird totem.
*The Seahawks mark above the heart honors the team.
*Feather-pattern graphic on helmet, in numbers and on pants represents natural elements of the Pacific Northwest, again inspired by the coastal Indian art
*The 12 feathers on the pant leg stripe represent the 12th Man. 12 feathers are also featured on each side of the neckline and the 12th Man logo is sewn on the inside back collar of the jersey.
*The Seahawks logo on helmet is bigger and bolder, connecting at a point in the back of the helmet.
*Jerseys are now made with a hydrophobic material that repels water, maintaining the jerseys “clean” look, making them lighter and not bogged down with water weight, resulting in better performance.
*Nike uniform is 20% lighter, 50% stronger and provides more of a shrink-wrap fit than previous models.
*Jerseys will go on sale on April 26, first day of NFL Draft, at the Pro Shop and on seahawks.com.