Ah yes, classic. In the quest for more speed athletes often look to make workouts harder with more drag. In this 1987 product review column, the Para-Shirt is reviewed and priced nicely at $26.95
(You can click on the image to make it larger and more readable.)
What are you using right now, for training and racing, that people will laugh at in 20 years?
Just in case you missed the Seat Leash, find it here.