Our answer
These figures describe fabric mass per unit area, not the weight of a complete coverall. The supplied sheets give 153 g/m² for 4.5 oz/yd² and 203 g/m² for 6 oz/yd². Cut, size, pockets and tape affect garment weight. Select based on hazards and finished-model performance.
Fiche fabricant Nomex Essential / Manufacturer fabric sheet ↗