GK shirts must be with a choice with short sleeves.
Imagine a goalkeeper from Iceland or Sweden to play in an Arab or Malaysian or Brazilian league with long sleeves with heat at 35 Celsius and Humidity close to 90%.
Even the local players use short sleeves.
Top Eleven players are from all over the globe.
That's why some seeing GK shirts like pyjamas.
I must remind, GK is the most important player of their squad, this is not only a visual update but a reminder of that.
The first designs are not so suitable to other team shirts in most cases and 30 tokkens for a new GK shirt for first release is not so friendly for the managers.