We're going to declare this as "Jox Friday." Here's another old school 1979 vintage sneaker and socks ad, this time by by Jox for their 'Mile-r' socks. Jox was the athletic shoe sub-brand of Thom McAn in the late 70s and early 80s.
Ad info is below:
JOX INTRODUCES A RUNNING SOCK WITH ARCH SUPPORT BUILT-IN
Developed for runners by Thom McAn to team up with their famous runner's shoe. The 'Mile-r' has springy lightweight panels of Lycra® knit-in to keep your arch well supported. There's a snug-fitting stay up top and a no-slide heel knit in to shape the sock in back so it won't slip down. Made in soft Hi-Bulk ORLON® to keep your feet drier and give you a long comfortable run for your money. Non-allergenic. Machine wash and dry. The 'Mile-r.' Newest in the JOX line of athletic socks.
Thom McAn
Built-in arch support available in ankle, crew and knee-hi lengths. At all Thom McAn stores.