What is the difference between basic and professional grade fishnets? Basic fishnets, made of nylon, are softer, thinner, and less supportive than professional grade fishnets. Professional fishnets are constructed from a sturdy nylon and spandex mesh combo. They extremely durable and supportive, and often also have a cloth pad at the sole of the foot for added comfort. They are usually higher in price than basic fishnets but have the potential to last far longer.