Yes most brands are and that is why they are sold for outside.
Teak is one of the most weather resistant materials for furniture. It does well in both sun and rain, and is resistant to mold. http://www.patio-living.com/teak_patio.html
Yes, Sedona outdoor cushions are fully water resistant and are approved for outdoor use in all types of weather.
There are many different material that outdoor furniture could be made from. They choose weather resistant materials such as plastic, wood, aluminum, wicker, and wrought iron.
I think this is a good outdoor furniture set. The materials are weather resistant and the chairs have padded sling seats. http://www.patiofurnitureusa.com/patio-dining-sets/aluminum-sets/delreydeluxepaddedslingdiningset.cfm
These two sites are ideal for your inquiry: http://www.alibaba.com/showroom/water-resistant-fabric-for-outdoor-furniture.html and http://www.wicker-furniture-showroom.com/IVG2/Y/CatID-3077-Resin-Patio-Furniture-Weather-Resistant-Chairs-Chaises.htm
Teak furniture is a high quality wood furniture. It is made from a tropical wood, teak, that is extremely durable, dense and weather resistant. Teak furniture is often used as outdoor furniture.
Aluminum Patio furniture is the most widely offered weather resistant furniture. These are purchasable from most patio furniture dealerships.
form_title= Outdoor Furniture Covers form_header= Protect your furniture from weather with outdoor furniture covers. What type of furniture will you cover up?*= _ [50] What are the weather conditions in your area?*= _ [50] What type of cover would you like?*= _ [50]
Of course if a hurricane or hail storm is forecast, you should secure or bring any patio furniture indoors. But outdoor benches are made to withstand rain, wind and sun because they are made of weather-resistant materials.
The best manufatcurer of outdoor furniture that can stand wet weather would be Brentwood. They are very reliable.
A weather resistant plastic or ploymer will be good for rooftop patio furniture.
The best design for outdoor patio furniture is made of weather resistant, wood or metal which is powder coated and fully welded together. The wood used should be from Teak which has a lifespan more than any other.