Scuba fabric is a type of double knit made from polyester and spandex, with a very fine gauge thread, and smooth texture. It's a little springy, very smooth and has a nice drape to it. Scuba fabric should not be confused with neoprene which is a thicker synthetic rubber and fabric hybrid that is more durable, flexible and is often used for wetsuits. You can also buy a fabric called scuba crepe which is a lighter version of scuba, more like a traditional Lycra but with a crepe textured finish.