Saint-Gobain VueLife® Culture Bags are all made using USP Class VI fluorinated ethylene propylene (FEP) film. VueLife® Culture Bags are intended to be used for the containment of fluids and suspensions during transportation, processing, incubation, storage and cryopreservation. The VueLife® Standard Culture Bags (“C” Bags) use an untreated form of this FEP film. Conversely, VueLife® Adherent Culture Bags (“AC” Bags) utilize a treated form of the FEP. This proprietary surface treatment results in the VueLife® “AC” Bag interior having a higher surface energy than the VueLife® “C” Bag. The modified surface of the VueLife® “AC” Bag is meant to better promote cell and protein adhesion to the surface of the bag.