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This review is from: Black Mesh Samsung Galaxy S3 i9300 Strong ArmBand Case Cover For SPORTS GYM BIKE CYCLE JOGGING, Tie iPod With Your Arm - Enjoy Music - by KING OF FLASH (Misc.)
I do have quiet big mussels on my arms and i struggle to keep this on. It is either so tight it leaves a mark and that is wrapped around to the tightest it will go or it will fall off. You can use the buttons on your phone though when using it although you do really need to take it off to see clearly what you are doing. Also everytime I slide my phone in, it either turn's the music right up or right down!!!