Gortiflex bellows are constructed from a tube of elastomer with optional fabric reinforcement formed into a completely sealed cover. The standard shape is round but other shapes are possible with low-cost tooling. A zipper can be added for easy installation, internal guides can be added for bellows intended to protect spinning shafts/screws. Tooling required to produce Gortiflex bellows, if not in stock, is significantly less expensive than traditional molded bellows tooling. This allows for fast, customized, low volume production and prototypes with small upfront costs.