**I received this product for free in exchange of my unbiased review/feedback. My findings are 100% mine and may vary from yours.
I don't have any iPhone 6 but my husband does so this review is an echo from my hubby's experience and finding with the iPhone 6 4.7 inch Armband from COST BROTHERS.
It's soft and has no shard edges to snag on the skin.
It has a velcro snap so adjusting the size is easy.
It can fit small to large width arms (9-16 inches)
The clear plastic cover of the armband does not affect the visibility and touch-screen sensitivity of the iPhone.
It is lightweight.
It does not fall off the arm even when running.
It has holes for easy access to earphones and controls.
It has a key holder too.
BEST FEATURE: It has reflectors for high visibility even if you use this at night.
Nothing. It actually suits my hubby's tastes and preference when it comes to using an armband that would fit his iPhone 6 perfectly. And this product does provide all that.
My hubby's recommendation:
He recommends this product because of the features and the extra protection and safety aspect the armband contributes to his running/walking activities. The reflector added a plus point because you can wear this even at night time and will add visibility to your activity.