As a sports headset, when designing ID, the focus is on the overall size ratio and construction method, which is as light and firm as possible, which is related to wearing comfort and stability. In the selection of materials to avoid vulnerable and corrosive leather, the use of wear-resistant waterproof silicone and cloth instead, enough to cope with a variety of sports environment. The earmuffs can be removed, washed and replaced, and there is a cold gel layer inside, which is very cool and breathable. Level 5 waterproof level, the keys and charging ports are protected by silica gel, rain is no problem. This is a sports Bluetooth headset designed for Philips.