These are the outdoor furniture covers with inflatable bladders that prevent standing water and mildew growth. Unlike traditional covers that sag and allow rain to pool on top, creating a breeding ground for mold, the inflatable bladders lift the covers and force water to cascade down to the ground. The bladders inflate in 90 seconds with an electric air pump (available below), enabling optimal air circulation under the covers to prevent condensation and mildew. The covers are made from waterproof, fade-resistant polypropylene fabric that won't crack or peel, creating an impervious barrier to dirt, snow, rain, and sun. The edges are sewn, not heat-welded like lesser models, providing superior strength at the seams. The bladders and covers are customized to fit specific furniture pieces and they come with tie-down straps for securing them to the furniture. Storage bags included. Round Table And Chairs. 90" Diam. x 29" H.