The Comply Isolation+ series now delights even Sennheiser fans! Thanks to the unique viscoelastic memory foam technology, the earpieces designed specifically for the size of the ear tubes of Sennheiser earphones fit perfectly to any ear canal due to body temperature. Although its size and shape may change with temperature changes or movement, Comply™ memory foam changes with the ear canal. This makes not only the clothes, but also the sound world really special and unique. It seems simple. Sounds great. Music is better with it. They have excellent noise isolation properties. Combines the eardrum with the IEM driver to achieve the perfect sound, even at lower volumes. The fittings of the Isolation+ series are designed with super soft memory foam, which gently fits into the ear canal, ensures perfect comfort and a long-lasting fit, and the Waxguard protection guarantees the exclusion of dirt from the sound port.