These soft and elasticated earplugs are made from a unique polyurethane foam developed by Sony. This means they adhere better to the ear canal, which improves sound insulation and blocks out more noise - especially in the high frequency range. This gives you a more comfortable and immersive listening experience. The combination of elastic and foam materials and the newly developed shape reduce pressure on the ear and make these earplugs extremely comfortable to wear. They are also easy to clean. Four different sizes are available, so you are guaranteed to find the perfect fit for the size and shape of your ears.