activewear       
noun [ U ] uk/ˈæk.tɪv.weər/ us/ˈæk.tɪv.wer/
 运动装
clothes that are worn for sports or other physical activities
  Women's activewear is becoming an important sector of the fashion industry.  女式运动装正发展成为时装界的一个重要领域。 
 - More examples
 - They sell activewear, swimwear, and children's clothes.
 - She has just launched her own line of activewear.
 - We make athletic apparel for men and women including sports bras, activewear, and team uniforms.
 - The activewear market is worth billions of dollars.