I'm not sure what it is about them, but they're just not as...unobtrusive, I guess is a good word...as the old ones. With the old ones, I would put it on and forget it. With these new ones I feel them no matter what. Our son doesn't have a sensory disorder but he is pretty particular about what comes in contact with his skin, and he absolutely hated the new version of the bands (he had no trouble with the old ones). The rest of us weren't fans and took them off as soon as we could each day, and the day we transferred to Universal we had them off before we left the resort for the last time. You'd think with the thinner, more flexible band material they'd be more comfortable, but they're not. It could because the puck is now so big that they're harder to ignore. Or something. I really wish they'd go back to the old design with the thinner band material.