Loop Dream™ Ear Tips are made from a blend of memory foam and silicone, designed to follow your ear’s natural shape, reducing pressure for the most comfortable fit. The memory foam forms a secure seal that stays in place all night, even when you toss, turn, or sleep on your side, while also providing our highest noise reduction of 27 dB (SNR) thanks to the extra material. Meanwhile, the silicone adds comfort and durability. To keep both materials performing at their best, clean the ear tips and earplug body before every use, check that the ear tip is firmly attached, and replace the ear tips after 100 uses.