I will post more extensive info a bit later, but I hope to give everyone a quick overview of the basic components!
Many people are not understanding why the Indians are wearing the same clothing as Roger. Roger is given the same clothing that the Indians wear, by the Mohawk. These components were worn by Indians across North America, with variations on theme, dependent on location and climate.
When different cultures live together, they adopt various elements of the other. Clothing moved both ways between the settlers and the Indians.