What's the one constant in Gaelic Football's ever-changing world?

Think of All-Ireland finals of yore. Páidí marching up and down the sideline in cream chinos. Kevin Heffernan in Lyle and Scott sweaters.

Short shorts. Cotton jerseys. Smaller hurleys, bigger hurleys. The ankle high boots of Aidan Skelton and Martin Furlong. The Rugby flanker boots of Pascal McConnell.