Umbrellas are walking billboards. They are easily the most visible & eye-catching way to expose your brand as well as being very useful! However, not all umbrellas are born equal and the best options to consider are those with the vented technology made to survive the strongest winds.
Fabrics most commonly used in the manufacture of umbrellas are 190T nylon as well as polyester and pongee depending on style.
A good tip if you want an umbrella that protects from the sun as well as the rain then there are silver coloured umbrellas available that do just that. They have been tested by ARPANSA (Australian Radiation Protection and Nuclear Safety Agency) and are rated at UPF50+ protection.