Thanks to its IPX7 water-resistant rating, the Under Armour True Wireless Flash is one tough cookie with regards to battling rainy weather or a sweat-inducing workout. The battery life on the Flash is something to rave about as it offers up to five hours on a charge whereas its water-resistant, aluminum charging case provides an extra 20 hours.  With its ergonomically-designed and comfortable-to-wear winged ear tips, you don’t have to worry about your earphones falling out during your grueling workout or training sessions. Additionally, the earphones boast impressive sound quality with rich bass and crisp details on higher frequencies.