■ designed for the HTC Butterfly s host ordered ■ Velcro adjustable arm band， according to personal needs resizing ■ Host top Zhiwu Dai fixed deduction， can prevent the host slide ■ the surface of the transparent mask， can enhance screen protection ■ important holes， have been reserved for empty baskets ■ comfortable， breathable good， solid and durable ■ looks simple and elegant， for men and womenYour favorite sports and fitness， still ultimately HTC Butterfly s host company. The HTC Butterfly s dedicated sports protective arm sleeve， has a Velcro adjustable arm band， allowing you to adjust the size according to personal needs and tightness， allowing you to exercise at the same time， you can still use it with confidence. And this movement arm sleeve， has a high permeability and high stability protective， more tightly covered live HTC Butterfly s host， will not easily slide loose. The important holes reservation and baskets empty， so you can manipulate unrestricted free!