They did. They used what they had available to use.
Alutiiq, Yup'ik, and Inupiaq are all Native American tribes that made their clothing from sealskin. These tribes lived in colder regions where they needed protective clothing.
they wore hand made dresses made out of animal skin
There were many different Native Americans in different parts of the country, and they had different clothing. The clothing reflected the needs of the climate of that area, and the materials that were available. In some cases clothing was made from leather, but also included fur and natural fiber from plants and wool. The needs of a Seminole in Florida were quite different from an Athabascan in Alaska.
it was made out of buffalo hide and deer hide.
Native Americans wore pants, shirts, dresses, and loincloths. There were often made from the skins of the animals that they hunted.
Native Americans on the Trail of Tears wore "period clothing" (clothing normal for that period in time). This included a great variety of clothing, mixed between traditional Native Clothing and European clothing.
Clothing
The Native Americans of the great plains depended on the buffalo. They ate its meat and made their clothing and homes from its skins. White men's guns killed the buffalo depriving the Native Americans of food, clothing, and shelter. White men's cows ate the grass the buffalo needed. White men's fences prevented the buffalo from changing pastures. Thus, the white men made it impossible for the Native Americans to continue their relationship with the buffalo.
Native Americans in the Southwest typically wore clothing made from materials like cotton, leather, and woven plant fibers. This clothing included garments such as breechcloths, skirts, moccasins, and ponchos. Jewelry and adornments were also important in their traditional dress.
It is known mostly as a symbol of the Native Americans. It provided food,clothing,and even tools made from its bone for them!
Native Americans wore very light clothing in the summer. This clothing would be considered very immodest in many other cultures in the world.