These fabrics can be interchangeable at times. They are made in blends of poly spandex and sometimes with nylon. The presence of nylon makes for a “stiffer” stretch and is most frequently used in swimwear. Which means if you have a performance fabric with nylon, you can use it for swimwear. These fabrics have great stretch and recovery as they are made to stretch with you as you move and return to their original shape.
What you can make: Workout clothing (sports bras, leggings, tops, shorts) and swimwear.