While we do have several heavy-duty fabrics, we would not actually recommend using these (or any of the fabrics currently on offer) for outdoor furniture over a long period of time as this can cause premature aging and discoloration.

Ideally, slipcovers intended for outdoor use should be UV-proof and water-resistant, and this may be achieved by using certain products like Scotchgard™ Water and Sun Shield with UV Protector - however, we have not tested chemicals/sprays like these on our fabrics, and cannot safely guarantee it would be effective.
 

Tip: You may test these out on our Fabric Samples!

Having said that, we'll definitely look into getting an outdoor fabric range so keep an eye out!