Mike_Orca If you start with a shirt like the one linked below, only two problems have to be solved
You can't start with something like what you proposed, because this shirt is elastic (please pay attention to the composition of the fabric: 77% viscose, 15% nylon, 8% spandex). Flexibility ensures its perfect fit to the body, but at the same time allows full access, because it can be stretched at any time. Locked clothing must be made of the least flexible material possible. All these types of protective clothing use either heavyweight cotton or a blend of cotton and polyester. Unfortunately, sewing a tight-fitting shirt from such materials is, first of all, difficult (it requires a perfect measurement), and secondly, such a shirt will simply be uncomfortable and will be hot in it (especially when the material is artificial).