Belkin Sports Sleeve Will The Belkin Sport Armband (the Black One For The Iphone....not The Plus Edition) Work With The Iphone 3g?

Will the Belkin sport armband (the black one for the iphone....not the plus edition) work with the Iphone 3g? - belkin sports sleeve

I speak not of the vagina blue helmet and gray spoke edition, etc. .. I mean the old original edition for the iPhone / iTouch. The iPhone 3G will fit in well w / headphones? Is the belt to remain in the car while you run? Thanks for any help