Windproof & Sturdy. Built with Aluminum Shaft & Reinforced Fiberglass Ribs, the Windproof Umbrella Owns a Sturdy Construction to Tackle Heavy Wind. Plus the High Density & Ultra Flex Canopy, the Small Umbrella for Backpack Rucksack Cast a Perfect Shadow to Keep You Dry. No Doubt This Travel Umbrella Compact Can Stand Up with Flying Colors in Wind-whipped Rain! Windproof Travel Umbrella, Automatic Umbrellas for Rain, Portable & Compact Umbrella for Backpack Rucksack, Sun Umbrella for Walking, Folding Small Umbrella for Car, Lightweight Strong Uv Protection