Our most lightweight and durable earphones yet, MW07 GO True Wireless Earphones are designed for those who are always on the move. Built to withstand the toughest workouts and travel in any weather, the earphones feature an IPX6 water resistance rating and are made from TR90 composite, a durable performance material used in professional sport eyewear. Patented silicone Fit Wings in 3 sizes and ear tips in 5 sizes ensure a secure fit during any activity. Master & Dynamic® MW07 GO Wireless In-Ear Earphones – Electric Blue