Unflippable, Unflappable, Unleakable. World's finest wind-proof umbrella. Tested at the college of Areonautic in Queens NY, will not invert in winds of 55+ mph. Limited Lifetime warranty. #1 umbrella on the PGA, LPGA, and Champions Tours. GustBuster has been featured on CNN, GoodDay NY, Regis and Kathy Lee, Talk soup and many more televison and radio shows. Patented technology allows the wind to pass thru the umbrella, while you stay dry.