I work at a California prison, which means walking miles outside daily, in the middle of a nowhere valley, where the wind whips in every different direction & rain blows diagonally, not vertically.  When it rains, the wind is worse and the average life expectancy of an umbrella is one or two wind bursts. I have gone through dozens of umbrellas.  I have bought "guaranteed" umbrellas in the past but they still turn inside out and break. I finally decided to try a vented umbrella but prison regulations do not allow an umbrella with the long tip, like most vented umbrellas have.  I finally found this one on Amazon and so far so good.  This umbrella is BIG but not cumbersome.  It is very sturdy and when the wind was whipping in every which direction, it handled it well and I wasn't worried it would flip inside out like every other one I have used. The first day I used my umbrella, I had 5 compliments -"that's a really nice umbrella!" which is goofy but just exemplifies how desirable a sturdy, functional umbrella is in our work environment. I gave several people item specs so they could also order this umbrella.  I don't like having to spend this type of money on an umbrella when so many have failed in the past but if it makes it through one or two rainy seasons, it is well worth the money. One drawback - it is a bit heavy.