GooDGo Premium Black New Running Sports Gym Armband Case Cover waterproof for Samsung S4 Sony Xperia Z1. Now you can take your Sony Xperia Z1 with you when you exercise or jog, with one of our sports armbands. The Xperia Z1 sits firmly in the pocket and the headphone jack remains open, for easy connection of headphones. With extra pocket for your key. You can use the touchscreen function even in the case! The protective cover and the screen film prevent the ingress of water or contamination. The armband is suitable for an upper arm circumference of approx. 37 cm. The armband is fastened with the Velcro fastener. For the Sony Xperia Z1.