Whether it is a question of woven fabrics, interlaced yarns, braids, nonwoven fabrics, or felts – hot air can assist with the manufacturing and finishing processes for all these textiles. Hot air is just as essential when drying fabrics after they have been dyed or washed as it is when coating functional textiles. Woven fabrics lined with nonwoven materials or membranes are not just popular in the context of functional clothing. Industry also makes use of such textiles, e.g., during filtration. One of the uses of polypropylene or polyester fabrics is the production of packaging for bulk goods. This involves welding them with hot air on fully automated fast-running systems. This is where the high power density and impressive maximum temperature of Leister air heaters really come into play, as processes can be optimized, resulting in even faster production.