The myprotein mens running jacket is a high performance jacket suitable for any occasion when the elements are against you made out of 100 polyester with a treated water repellent technology featuring ventilation holes on the back along with thumbhole openings zip pockets and laser cut holes for headphones reflective myprotein logo and stripes on the shoulders make this the perfect running jacket for visibility style and performance fabric composition 75 denier 92 polyester 8 elast