The vacuum bags make a stable impression, firmly sealed and delivered in the specified dimensions. Because the bags are intended for rolling, you need a vacuum cleaner to "Removing the air", but squeezes out the air by hand. This works very well and even while traveling, if vacuum cleaners or power connection is missing. However, the meandering channel, through which the air must escape from the primary application something "stuck" because the film sticks together. With a little shake, pressure and patience, the air escapes but quite fast for a rich pop. So close things pure, zip closure completely and starting from the closing roll toward the other end.
