This form-fitting black polyester cover cinches up below the side tables to supply snug all-season protection for Weber Spirit II 310 series gas grills (and all other Spirit 300 series grills). Fastening straps tighten down to keep the cover buttoned down, inhibiting flapping and blow-ups when windy. The resilient polyester fabric deflects precipitation and provides a barrier against tree pollen, pests, leaves and grit, among other airborne aggressors.