The use of high quality multilayer technical cardboard made form cellulose makes it possible to reduce significantly the weight of the bellows while at the same time achieving better airtightness (i.e. a higher performance in the compression and suction of air) as well as better elasticity and spread.

Also, thanks to special glues, we have reduced the annoying noises which often occur when the bellows are in motion. We must also point out the remarkable compactness of the fold packet when the bellows are closed (due to the absence of gaps between the folds) and its excellent planarity (see picture below).