World Athletics is set to announce the findings of a review of technology in road and track shoes by the end of January, and it is expected to change its rules in light of tumbling times recorded by athletes using Nike’s Vaporfly brand.

Axar.az reports citing foreign media.

Following are some facts on the shoe and how athletes using it are breaking records:

* The Zoom Vaporfly shoes first came to prominence in 2016 and were worn by the first three finishers in the Rio Olympic men’s marathon. Nike have developed various versions since.

* Eliud Kipchoge, wearing a prototype Nike AlphaFly, became the first man to break two hours for the marathon in Vienna last year, albeit in an unofficial race.

* The Kenyan also wore a version of the shoes when he set the official world record of 2:01.39. Kipchoge’s 78-second improvement on the existing record was the largest improvement in over 50 years.

* His compatriot Brigid Kosgei beat Paula Radcliffe’s world marathon record in October in the latest version of the shoes, reducing the mark by 81 seconds to (2:14.4).

* Dutchwoman Sifan Hassan took double gold at the World Championships in Doha in September, when she won the 1,500m and 10,000m in a track spike version of the shoe.

* Last December Uganda’s Joshua Cheptegei broke the 10-year-old 10km road world record in Valencia by six seconds. The top five at the event all wore a version of Nike’s Zoom Vaporfly 4%.