FOOWIN rock chair uses high-density composite materials will never fade, splinter, crack, chip, peel, or rot when exposed to the elements.Patio rocking chairs ergonomically designed backrest radian, smooth rocker, sloped back rest, weather resistant material, sturdy structure, and double protection of safety lock.The rocker of this rocking chair has been tested repeatedly to achieve the perfect ratio of radian and length. It only takes 15 minutes to install a chair. And buying 2 pcs/4 pcs can enjoy a bigger discount,If you have any questions, please contact us, we will always be here