How did Matt make a new warm clothing for himself in sign of the beaver?

In "Sign of the Beaver," Matt makes a new warm clothing for himself by using the skills he learned from his father and the knowledge of the Native American culture. After losing his own clothing, he crafts a coat using animal hides, which he learns to prepare with the help of Attean, a member of the nearby Native American tribe. This process not only provides him with necessary warmth but also symbolizes his growing independence and adaptation to his environment.