They stop ya feet touching your shoes, it aint rocket science.
Now for the rocket science..
Athletic Ribbed Terry Loop In Forefoot, Heel And Toe For Medium Cushioning
Reinforced Toe And Heel Seamless Toe Closure
Medium thickness - Additional cushioning throughout the sock for a more secure, comfortable fit with a greater impact protection.
77% combed cotton, 19% polyester, 2% nylon, 2% elastane