Garment: ESD Coat vs ESD T-shirt

In the company where I work (SMT Process), we are studing to change the ESD Garment used:

→ ESD Coat long-sleeved to ESD T-shirt short-sleeves.


1- Can ESD-STM2.1 be used as a standard to validate ESD T-shirt?
2- Is there any contraindication for using ESD T-shirt instead of ESD Coat?


Yes, ANSI/ESD STM 2.1 can still be used to qualify and test T-shirts.

There should be no contraindications for the use of T-shirts as long as the personal are grounded.