Sony provides three sets of ear tips (small, medium, and large), and to get the most comfortable and secure fit, I need to use the largest ear tip size for my left ear and the middle size for my right. The ear tips strike a good balance between being soft enough to mold inside the ear and stiff enough to hold the buds in place. The round side of each bud rests up inside the ear’s cartilage and keeps them in place, which gives you a target to aim for when using touch controls. Because the buds don’t rest on the face in any way, they are more secure when chewing, talking, or removing a mask. Eventually, They still lose a bit of their seal, but it’s a comfortable and reasonably good fit overall.