November 1968- Swimming Speed Mask

The Optical Journal - Optical News With Independent Views

How far we have come in the last 30 years.. Do you think Michael Phelps would have won wearing this? Source 

This prow-shaped mask with built-in snorkel and compass holder was invented by Calvin Gongwer and used by him in a recent 22-mile swim from Catalina Island to San Pedro Calif. He claims that the “speed mask” cuts drag by 35 percent.