Another differential advantage is counting with the "tamper-evident" sealing system, which makes them even more efficient..
Transval
bags cannot be opened intending to close them back because of being
doubly gusseted on their sealed sides, making them even safer -
there is a security band in between the gussets. Our bags are
truly inviolable.
The "tamper-evident" tape is
very difficult to peel off - when done, an inscription appears on
the body of the bag: "void". Sticking it back and making the letters
coincide is impossible.