The Fin Ultra is our most comfortable ear tip to date. The open-skeleton design allows for more ambient sound delivering 360 degree situational awareness. The semi-translucent soft Shore 25 Silicone makes it one of the softest ear tips available. The soft fin fits within the inner contours of your ear, keeping the tip in place during even the most rigorous activity. The Fin’s cone shape fits into the opening of the ear canal without penetrating the inside of the ear.