

Lycra is just another name or brand name for elastane. It's used to describe fabrics used in swimwear, sportswear, or dancewear. These are usually made of polyamide with an elastane content of 18 to 25 percent. This makes them very stretchy and conforms to the body shape.
Details
Good to know
Washing recommendation
The fabric is washable at 30°C
Specific References