Making your own outdoor cushion fabric is not the easiest project around, but if you have some time on your hands and are carried out with a sewing machine, it will be worth the effort to have cushions made to measure. Make cushions outdoors for your outdoor furniture, or to sit on the floor or deck to rest. Consider your climate and the use of cushions when choosing a fabric. If you are going to be under a patio or umbrella roof, you do not need to be as sturdy as if you are going to be sitting outdoors getting wet.
If you live in a hot climate, outdoor cushion fabric will be milder faster, so search for tight synthetic, thick fabric, and avoid nylon and cotton. For a durable outer fabric that is water resistant, try tent, duck or tent canvas awnings. If your cushions are sitting under a covered patio, whatever your use of upholstery fabric you would like, considering that some are stained more easily than others if you have children or animals.
Threading depends on the fabric, but the use of a mildew and rot resistant thread in the thickness you need. Regular thickness yarn will work for plain fabrics, but for heavy or duck tarpaulin, use a thickness of polyester or nylon yarn. If making zip-on outdoor cushion fabric, choose the plastic zippers to prevent them from rusting. Choose from batting or mildew resistant foam to fill your cushions with. For sewing outdoor cushions, a heavy needle, such as a denim needle, is needed to get through the fabric.