All FoodSaver® brand heat-seal bags and rolls are constructed of multi-layer plastic for a durable, air-tight seal. FoodSaver® brand bags are constructed in the following thicknesses:

FoodSaver Bags – Heat-Seal (all)
Smooth side: 3mils thick
Textured side: 11.5mils thick

GameSaver Bags – Heat-Seal (all except Heavy Duty Bag; see below for specifications on thickness for this bag)
Smooth side: 3mils thick
Textured side: 11.5mils thick

GameSaver Heavy Duty Bag – Heat-Seal
Smooth side: 4mils thick
Textured side: 11.5mils thick