The QuietComfort 35 is a pair of wireless over-ear headphones designed by Bose. They feature active noise cancellation technology, which helps to block out ambient sounds, providing a more immersive listening experience. The headphones are equipped with Bluetooth connectivity, allowing users to connect to devices without the hassle of wires. With a battery life of up to 20 hours, the QuietComfort 35 is ideal for long listening sessions. They also come with built-in voice assistants, enabling users to access features like music control and phone calls hands-free. The headphones are known for their comfortable fit and high-quality sound performance.