While I sympathise with your guys’ lack of comfort, the clothing they wear depends on the insurance cover for wearing PPE.
At a former company I used to state that anyone who does not wear PPE ‘properly’ may lose 50% of any claim against the company for any harm caused in this state of ‘undress’, accordingly the company may also lose 50% of its protections due to an apparent lack of enforcement of the clothing rules!
= Suit yourself!!