Pongee is a type of fabric that is often used in the production of umbrellas. It is a tightly-woven fabric that is typically made from silk or synthetic fibers. While pongee fabric does provide some protection from the sun, the extent of this protection depends on a number of factors, including the tightness of the weave, the color of the fabric, and whether or not it has been treated with UV coatings.
UV-coated pongee fabric can offer greater protection from the sun's harmful rays. UV coatings are applied to the fabric during the manufacturing process and can help to block out UV radiation. However, the effectiveness of the UV coating will depend on the quality of the coating and how well it adheres to the fabric.
It is also important to note that while an umbrella made from pongee fabric with UV coating can provide some protection from the sun, it should not be relied upon as the sole means of sun protection. It is still important to use other forms of sun protection, such as sunscreen, protective clothing, and staying in the shade during the hottest parts of the day.