* Built-in host maximum size: width of about 15cm x 8.3cm x 1cm thick * Before ordering can be measured on the arm circumference size， optimal circumferential length: 28cm or more; too thin compared to those not applicable. ■ Designed for HTC One M8 host ordered ■ wetsuit fabric material arm band， soft and comfortable ■ Velcro adjustable arm band， according to personal needs resizing ■ the surface of the transparent mask， can enhance screen protection ■ looks simple and neat， for men and womenWhen listening to music， sports and fitness love you still and ultimately beloved phone companions. The HTC One M8 dedicated minimalist style sports arm sleeve， with wetsuit fabric material and Velcro adjustable arm band， soft， comfortable， allowing you to adjust the size according to personal needs and tightness， allowing you to exercise at the same time， you can easily use it. And this movement arm sleeve， looks simple but elegant， and arm sets the perfect fit， simple design make love to you， but do not have the same choice!