In tune on and off the field. If you look closely at this adidas Northern Ireland home jersey, you'll spot sound wave graphics running up and down it. They pay tribute to the songs and chants that reverberate around Windsor Park on match days. In the background, moisture-managing AEROREADY keeps football players and fans comfortable. A woven badge on the chest rounds out the look. The main material of the jersey is 100% recycled polyester excluding trimming and decoration.