[Water&Fade Proof Material]: Unlike other chair cushions that can only be used indoors, our chair pads are made of outdoor high-quality polyester fabric, which is waterproof and fade-resistant. It can resist fading for more than 1200 hours under the sun, and keep the colors bright for several seasons. [Indoor and Outdoor Use]: Package includes two square seat cushions, about 18x18x2.5 inches in size. You can use this 18x18 outdoor chair cushions not only in the dining room, kitchen, office, but also your patio, garden,porch for a outdoor party! Our chair pad suitable for indoor and outdoor use. [Comfortable Padding]: 2.5-inch thick high-density foam pad provides good support and comfort, which can reduce the pressure on the tailbone and relieve the discomfort caused by sitting in a hard chair for a long time. [Flexible Ties]: Attached ties is strong and long enough to fix the patio chair cushions in place on the chair, and will not move during use. It can be easily removed when it is no longer used. [Removable Design]: This outdoor square chair cushions adopts the invisible zipper design, which can easily remove the cushion cover for machine washing or hand washing. Set of 2 outdoor square cushion 18x18 inch, made in quality outdoor material which is waterproof and fade resistant. Our chair cushions suitable for indoor and outdoor use.