Sure it's big and a bit of a pain to carry around once it stops raining, but it gets the job done and doesn't let you down. Make sure to always buy a clear one so you can see through it if you hold it down to enclose your face in the bubble. I got mine two summers ago at Target for $10, but prices have raised to about $17 due to increasing popularity.
Go and get one before the next flood!!
PS: For you two males who follow paperbag trendy, guys with bubble umbrellas are cute. Guys who are drenched from the rain are lazy and look like wet dogs.