A:AnswerI use the arm-band with an IPod 4th generation that also has a case. It is somewhat difficult to get the IPod & case into the band, but the material does stretch to accommodate it.
A:AnswerNo. The iPhone 5, 5S or SE will only fit in its original birthday suit without cover. there is no access to the volume, on/off or mute switch but there is access to the home button and all touch functions.
A:AnswerDepends on how wet it would get. It's neoprene and handles sweat and a light rain ok. If it could get really wet you may just want to get a otterbox