Elastane is a synthetic fiber known for its exceptional elasticity. Often blended with other materials like cotton or polyester, it allows fabrics to stretch and return to their original shape. This makes elastane a popular choice in clothing items such as activewear, swimwear, and fitted garments, providing comfort and freedom of movement. The fiber is commonly referred to by its brand name, Spandex, in the United States, and Lycra in other parts of the world. Its ability to withstand repeated stretching and maintain its form makes elastane an essential component in modern textiles, enhancing both performance and fit in various apparel.