KSC55 is generally a very tight squeeze on the head. The band presses pretty hard against the area above the ears. Despite that, I enjoy using them more than most headphones on the go. The sound is bass heavy, and a bit lacking in overall separation and clarity, but it has a full sound that gives it an edge. In an environment where you can't hear them clearly, the lack of clarity is not an issue, and the excess bass allows you to continue to hear your music enough to know where it's at. Heartily suggested for loud rock music, rap/hip hop, techno, etc. Anything where the energy of the sound is more important than the clarity of it. Word of warning though: this range of Koss headphones are not the best built, and I have had problems with multiple pairs where over a few months, the headphone cable snaps and/or the band snaps by accident or in an attempt to help bend the earphones outward to put less pressure on my head.