To some, it may seem like just a small gesture. 

But there’s no doubt that it meant the world to this cold, lonely pup.
The other day, Fernando Gabriel and his brother, Felipe, were about to ride the subway in São Paulo, Brazil. When Felipe went to purchase the tickets, however, someone caught his eye.

“He saw a dog shivering in the cold,” Gabriel told The Dodo. "It was the coldest day of the year."

Yet, as Gabriel looked on puzzled, his brother began to undress.

“I noticed my brother taking his backpack off his back and started filming,” Gabriel said. “He continued. He took off his jacket, sweatshirt and put his shirt on the puppy who was very cold. He did it spontaneously. It was very moving.”