Why are they wearing those GPS vests during a football game? — GI-technology in modern-day soccer – GoGeomatics
Football GPS Vest: Are They Worth the Money?
Using something besides a "vest" (sports bra) for GPS tracker : r/bootroom
Amazon.com : STATSports APEX Athlete Series GPS Soccer Activity Tracker Stat Sports Football Performance Vest Wearable Technology Adult Small : Sports & Outdoors