These tips come in a specially designed spherical shape that contacts less of the ear canal, making the fit extremely comfortable. Creating an optimal seal and channeling sound directly into the ear canal, these tips transform your listening experience from ordinary to extraordinary.Body heat-activated foam gently seals the ear canal, giving you a custom fit and remarkable in-ear retention, so your earphones remain secure ? all the time, every time. These tips allow you to enjoy your music in noisy environments without raising the volume. The unique memory foam provides all-day comfort, an improvement over stock silicone tips.