Bestbuy offers Jabra - Elite 4 True Wireless Noise Cancelling In-ear Headphones - Dark Grey for $49.99 (orig. $99.99) with free shipping.

Product Description:
Pair or Swift Pair features connect instantly with no hassle. With comfortable rainproof durability and Active Noise Cancellation, these wireless earbuds can tune into your music or be used while on-the-go. Wear the earbuds alone in either ear with mono mode or together as a pair. Long battery life with 5.5 hours in the buds and a total of 22 hours with the case (28 hours ANC off). 

• Easily switch between devices
  Multipoint connects to phone or laptop at same time, seamlessly switching between each device as needed.
• Connect in seconds
  Connecting is a breeze. Pair with your iOS, Android device or PC in seconds. Fast Pair and Swift Pair are both on board.
• Listen for hours, charge in minutes
  Enjoy long battery life of up to 5.5 hours in earbuds, 22 hours with case (28 hours ANC off), and fast charge feature provides 1 hour of battery in 10 minutes. Use only one ear bud while in Mono Mode to extend battery life.
• Immersive Sound
  Active Noise Cancelling Earbuds that block background noise, or switch to HearThrough technology so you can hear your surroundings as needed. 4-microphones ensure crystal-clear calls anywhere.
• Comfortable, stylish and durable
  Choose from 3 different sized eargels to get a secure ergonomic fit that's comfortable for all day use and has a stylish design. IP55 rated for maximum durability and rainproof protection for wherever your day takes you.
• Use either earbud
  Go solo in mono mode and use either earbud while the other charges in the sleek case