Question: is peva the same as silicone?
Answer: First, let me say that (Re)Zip bags are not made of silicone—they're made of a plastic called PEVA, or polyethylene vinyl acetate. ... Like Stashers, the (Re)Zip bags are durable. They are slimmer than Stashers, which made the most difference when traveling or stashing a snack in my already stuffed gym bag.