There is plenty of outdoor furniture that is not made to be fully waterproof. Many outdoor furnishings have fabric cushions, for example, that must be washed frequently if they are left outside. \
You do not have to choose waterproof outdoor furniture, but it requires far less maintenance and work if you do. You can always learn how to winterize your outdoor furniture if it isn't made to withstand the elements. \
Outdoor furniture can be covered or moved indoors any time there is bad weather or even heavy sunlight, which can have a negative effect on outdoor furnishings over time. It takes more time and work, but you can choose outdoor furniture that is not made to be waterproof if you prefer it. \