"Under Armour True Wireless Flash X Headphones ($170) feature a sweatproof and wireless design that makes them perfect for wearing when running on a hot summer day. I appreciate that they have Ambient Aware technology that allows you to listen to your music but still be aware of your surroundings. I always forget to charge my headphones, so the battery life, which is 10 hours plus and an additional 40 hours with the charging case, is a major bonus." — GFR