Ethylene Tetrafluoroethylene (ETFE) is a fluorine-based plastic polymer that offers a creative and lightweight alternative to glass. Developed over 40 years ago by DuPont, ETFE has similar light transmission to glass, but at just 1% of the weight. With a lifespan of over 30 years and excellent weathering properties, ETFE film is becoming the material of choice for an outdoor and outdoor/indoor spaces in a variety of climates. An ETFE cushion application, using multiple layers of ETFE with air-filled pneumatic cavities, works extremely well for fully enclosed thermal envelopes.

ETFE (Ethylene Tetrafluoroethylene) film is durable, highly transparent and very lightweight in comparison to glass structures. ETFE is being considered the material of choice for traditional skylight applications to long span structures and building facades.