[IPX8 Waterproof & Comfort Fit] With an IPX8 waterproof rating, this wireless earbuds can effectively prevent damage from water, sweat and rain, so you can focus on your workout and enjoy your outdoor activities. These headsets adopted a curved, ergonomic in-ear design, making them comfortable to wear for long periods of time and not falling out when playing sports. There are 6 pairs of different sized soft rubber ear caps for you to choose from.