The Messenger of Allah (ﷺ) used to pray on a mat and on a tanned skin.
Sunan Abi Dawud Book 2, Hadith 269
← Previous Hadith Anas b. Malik said; the prophet (ﷺ) used to visit Umm Sulaim. Sometimes the time for prayer would come and he would pray on out carpet that was really a mat. She (Umm Sulaim) used to wash it with water.

Sunan Abi Dawud Book 2, Hadith 268 Next Hadith → we used to pray along with the Messenger of Allah (ﷺ) in intense heat. When any of us could not rest his face on bare ground while prostrating due to intense heat he spread his cloth and would prostrate on it.

Sunan Abi Dawud Book 2, Hadith 270