how to unwrap union value in list in f#

You know that to unwrap a value of a single union type you have to do this:

type Foo = Foo of int*string

let processFoo foo =
    let (Foo (t1,t2)) = foo
    printfn "%A %A" t1 t2 

but my question is: if there a way to do that for lists ?:

let processFooList (foolist:Foo list )  =
    let ??? = foolist // how to get a int*string list
    ...

thanks.