The JBL UA Project Rock sport headphones were personally tested by former wrestler Dwayne Johnson, which explains the product name. With active noise cancelling they are designed to help the user stay focused during a workout. The JBL Charged Sound was boldly optimised and tuned with rich bass for motivation. To protect the earbuds against sweat and water ingress, they are IPX7 rated. Washable ear pads with excellent grip further contribute to user satisfaction.