All custom-fit In-Ear Monitors designed by Spiral Ear are hand-crafted  and utilise soft, medical-grade silicone. The material easily adjusts to your ear anatomy because of its flexibility and nature, providing the highest levels of consistent seal possible, i.e. isolation from ambient noise.

Apart from that, silicone adapts to alterations of your ear canal more easily and comfortably than any typical, hard material, reducing changes caused by natural muscle movements of the entire jaw. Thus, silicone gets you your ultimate fit!