The Step2 Large 40 inch diameter Umbrella adjusts to heights between 32.5 and 51.5 in. and is designed to provide protection from the sun and the damaging effects of ultraviolet rays. The Step2 Umbrella has an UPF rating of 40+ which means blocks up to 97 percent of UVA and UVB rays. Six strong resilient support ribs absorb the wind without breaking or disfiguring. The gray telescoping pole with pointed base drives into the ground and sand easily. The Step2 40 inch Swirl Umbrella also features easy push-up opening and closing by an adult.