
Why professional swimmers wear two caps
Credit: Isiwal/Wikimedia Commons/CC BY–SA 4.0, CC BY–SA 4.0 via Wikimedia Commons During swimming competitions you often see athletes take off their caps and discover a second one underneath. In a sport where victory is played out on hundredths of a second, every tiny advantage counts. There double headphones serves to guarantee maximum hydrodynamics possible, eliminating folds that would create resistance, ...








