Superflite offers three different polyester fabrics, all suitable for a variety of applications. The 104 fabric is an uncertified lightweight fabric that's 1.7 ounces per square yard, making it perfect for ultralight applications. The SF102 fabric is 2.7 ounce per square yard, FAA-approved, and it is used with most certified aircraft. The SF101 fabric is our heaviest fabric - it's 3.7 ounces per square yard, FAA-approved, and is used with higher speed aircraft, bush planes, and warbirds. The SF102 and SF101 are approved to use with any STC'd coating system. All of the Superflite fabrics are made in the USA.