Sun Tek 46" UV Protection Vented Canopy Umbrella with Auto Open Telescopic Fiberglass Shaft UV PROTECTION  Silver coating reflects heat to cool you down; 55+ UPF for the highest protection from UVA, UVB, and UVC rays WIND & WEATHER RESISTANT - 100% nylon, double-canopy, Vortec venting system prevents umbrella from inverting during high winds; built to provide protection from sun, rain, hail, snow, and sleet DURABLE CONSTRUCTION - Fiberglass shaft and ribs not only make this umbrella durable and lightweight but also provide extra safety in the event of a lightning storm COMPACT DESIGN & PATENTED TELESCOPIC SHAFT  Collapsed length: 17.5, Extended length: 22.5, Arch width: 46 measured across open canopy, Weight: 1.1 lb, Includes matching storage sleeve AUTO OPEN  Umbrella conveniently opens with just push of a button located on the rubber waffle grip handle