For a long time, sportswear was made from absorbent cotton. Due to its low elasticity, lack of breathability, and relatively... moreFor a long time, sportswear was made from absorbent cotton. Due to its low elasticity, lack of breathability, and relatively high weight when wet, natural fiber could no longer withstand modern demands. Many manufacturers have therefore switched to synthetic fibers. Your advantage: They can transport moisture away, are often weatherproof or water-repellent, and are considered very elastic and dimensionally stable.