I used the side property to give my object an interior, but it also reflects the exterior:
let material = new THREE.MeshStandardMaterial({side: THREE.DoubleSide});
https://i.sstatic.net/oikad.png
https://i.sstatic.net/Vb03K.png
Is there a way to reduce the visibility of the interior (maybe change its opacity)? I'm trying to emphasize that the jersey has lighter colors on the inside.