superlight       
adjective (also super-light, super light) uk/ˌsuː.pəˈlaɪt/ us/ˌsuː.pɚˈlaɪt/
 极轻的
extremely light in weight
  These plastics are superstrong and super light, but also superexpensive. 这些塑料超级结实、超级轻,但也非常昂贵。 
 The material is super-light, and quick-drying. 这是一种极轻又快干的布料。 
 - More examples
 - It's worth investing in a bike with a superlight frame.
 - This superlight car goes from 0-60 in just over three seconds.
 - The lawnmower is superlight and efficient, but you still have to sweep up the leaves afterwards.
 - You can download books and read them on this superlight wireless computer.
 - The boots are really comfortable with a super-light feel.
 - Whisk the egg whites for 5-10 minutes until they are super light and fluffy.