PC Cavity & Exclusively Designed Ear Tips, Ear Fins PC cavity covered with UV varnish, which makes earphones look elegant. The ear tips adopt TPE material, which is comfortable and smooth to wear. Groove design at ear cap brings more stereo sound, enhancing details and sound stage. The short sound guide tubes reducing sound loss. TPE soft and environment-friendly fin is added to the rear of the cavity, providing a more comfortable, stable, lighter experience. THE COMFORTS YOU WERE LOOKING FOR We didn't just focus on sound quality, also the ultra-lightweight material and ergonomic shapes providing maximum comfort and lightness. A single headset weighs only 2.3g. Wearing without Pressure, Releasing the Burden of Ears. There're also 3 sets of soft eartips for different ear sizes. Wrap-around ear design keeps earbuds from slipping out while working out. The memory ear hook can hold its shape around the ear. RESISTANT AND COMPATIBLE CABLE Professional 4 core 4N O