A symbol of Vietnamese culture: The conical palm leaf hat

For a long time, the images of young ladies with a conical leaf hat known as '' Non la'' has made a strong impression on visitors to Viet Nam. It is a symbol of Vietnamese charm and beauty. Its diameter is 45-50 cm and with height of 25-30 cm. The simplest materials such as dry leaves and a conical frame are required to contruct ''Non la''. The leaves are made from bamboo. They are taken from the softest trees and placed in dew for a night to be dried. After being flattened,the leaves are sewn on a conical frame consisting of 16 to 18 round bamboo rims. Finally, the hat is trimmed and painted with a coat of atter old to keep it clean, smooth and water-proof. In conclusion, years have passed but ''Non la'' still strongly remains as an ever persisting symbol of the Vietnamese culture.

Maybe you meant "Varnish" instead of atter old. 

A symbol of Vietnamese culture: The conical palm leaf hat

For a long time, the images of young ladies with a conical leaf hat known as ''Non la'' has made a strong impression on whomever comes to Viet Nam. It is a symbol of Vietnamese charm and beauty. Its diameter is 45-50 cm wide and 25-30 cm high. The simplest materials such as dry leaves and a conical frame are required to contsruct ''Non la.'' The leaves are made from bamboo. They are taken from the softest trees and put in dew one night to be dried. After being flattened, the leaves are sewn on a conical frame consiting of 16 to 18 round bamboo rims. Finally, the hat is trimmed and painted with a coat of atter old to keep it clean, smooth and water-proof. In conclusion, years have passed, but ''Non la'' still strongly remains as a part of the spirit of the Vietnamese culture.