Encased Armband for Otterbox Defender Series - iPhone 6 Plus 5.5" (case not Included) Compatible with the iPhone 6 PLUS 5.5" Otter box Defender case (case not included) COMFORTABLE lightweight neoprene will form to the arm but will not stretch out of shape. UNIVERSAL FIT: Armband is small enough to fit slim arms yet expands up to 14" SAFETY: Highly reflective pattern provides nighttime jogging & running protection Maintains direct touchscreen access and button functionality during your workout.