Why doesn't anyone wear long-sleeved jerseys in Serie A?

In recent years, the merchandising system of Italian football clubs has grown exponentially, a mainly quantitative expansion given the continuous launch of celebratory and vintage jerseys, pre-game and training shirts in addition to the traditional match kits for sale through the official channels. But in the meantime the long-sleeved shirts has practically disappeared. Not only are they almost no longer used by teams and players, but they are also not available in the online stores of Serie A teams, unlike what still happens for foreign clubs, regularly on sale for a few euros more than traditional ones: those made by Nike x PSG, the PUMA x Manchester City, the New Balance x Liverpool  and the adidas x Real Madrid. But exactly, how was this possible? Is it a tangible sign of the evolution of football equipment or a simple problem of an economic nature, perhaps because for some brands it's no longer convenient to produce shirts that nobody wears and which are too often unsold? Whatever the real reason, the extinction of long-sleeved shirts hurts all those really addicted to retro clothing garments and the old-time football aesthetic.

Certainly it cannot be a 'climatic' reason, given that the players have not suddenly stopped feeling cold during the winter games, nor have the temperatures undergone unexpected increases. Nor it's because of the new regulations of the Italian FA, since nothing has changed regarding the equipment that can be worn regularly on the playing grounds, as well as the turnabout of a single technical supplier. Stylistically there is a big difference, even if give up the long-sleeved shirt did not turn into such a serious problem. The alternative solution that has already become a trend is to use a tight-fitting shirt to be worn under the game kit, possibly matching the color of the overlying shirt. A gimmick that guarantees a different adherence between the fabric and the skin, but surely it is much less pretty from the aesthetic point of view and that does not convince the purists of the game.

The long-sleeved football shirt has inevitably marked many moments in the history of football, concerning memories of goals and results and many match outfits of many footballers: it's hard to image Gerard Piqué with a short-sleeved shirt, for example, as it's very rare to see Cristiano Ronaldo wearing short sleeves during the colder months. In addition to the Portuguese, the trend to cover himself as much as possible is traditionally linked to many Latin and South American footballers, the same ones who in more critical situations also wear gloves. A definitely singular case is that of Daniele De Rossi, who over the years has often worn a particular long sleeve + short sleeve version, to cover some tattoos on his arm.