Bose QuietComfort Ultra Earbuds are the ultimate wireless noise cancelling earbuds for a truly immersive listening experience. These high-quality wireless earbuds feature breakthrough spatialized audio for a deeper level of immersion that makes your music feel more real than ever before f no matter the content or source. Bose Immersive Audio pushes the boundary even further and takes what youfre hearing out of your head and places it in front of you for the most natural listening in a pair of spatial audio earbuds. And Bose CustomTune technology takes it to another level by analyzing your earfs shape and adapting the sound and world-class noise cancellation so everything hits just as it should in your noise cancelling earphones. The comfort is shaped to you, too. With these Bose noise cancelling earbuds, you get nine combinations of eartips and stability band sizes to find the best fit.