Shama-il Tirmidhi Chapter 10, Hadith Number 3 (73).

‘Eesa bin Tahmaan says that Anas radiallahu anhu took out a pair of shoes and showed then to us. They did not have hair on them. Later Thaabit told me these were the shoes of Rasulullah Sayyidina Rasulullah sallallahu alaihe wasallam.

Commentary.
It was common in ‘Arabia that the hair was not removed from the skin from which shoes were made. For this reason the narrator mentioned the hair.