80% Spandex, 20% No  
  
 Utility Thumb Holes: The crop quarter zip pullovers with thumb holes can keep sleeves in place pretty well when you do exercise; mock neck for warmth  
  
 Stand Collar: You can unzip your crops for good breathability and movement; with covered edge of top, your neck won't get hurted when you zip it  
  
 Super comfy and skin-friendly cropped workout running jackets, 1/2 zip or full zip tops  
  
 NOTE！Two styles for you: A and B; style B is 1.5'' larger in chest and 1'' longer in full length than style A; style B is full zip jacket made of 87% Chinlon/13% Spandex  
  
 NOTE！Slim fit style, the size is a little smaller than usual, so please choose one size up if you want it a bit looser.