tshirts not working

[latent bloom]

I made a mod with T-shirts, they are displayed in the inventory, but when you put them on they do not work. how can I fix it?

[wheat yew]

@latent bloom make sure your texture is called "Shirt.png"

[latent bloom]

do I need to add a .png?

[somber shoal]

preferably yes

also in the import settings of the shirt texture, under the advanced tab, make sure read/write is enabled