On January 19, 1935, during a blizzard, Coopers Inc. sold the world’s first briefs at the Marshall Field’s State Street store in downtown Chicago. Designed by an apparel engineer named Arthur Kneibler, briefs dispensed with leg sections and had a Y-shaped overlapping fly. The company dubbed the design the Jockey, since it offered a degree of support that had previously only been available from the jockstrap. Jockey briefs proved so popular that over 30,000 pairs were sold within three months of their introduction. Coopers, having renamed the company Jockey, sent its Mascul-liner plane to make special deliveries of masculine support briefs to retailers across the US. In 1938, when Jockeys were introduced in the UK, they sold at the rate of 3,000 a week.