These are no longer available from the manufacturer. Please see one of the the new Ambi Fins here: 

We are proud to announce the Fin, the most comfortable ear tip to date. The semi-translucent soft Shore 25 Silicone makes it one of the softest ear tips available. The soft fin (available in Right or Left Medium) 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. With the Fin, it’s easy to distinguish left from right, there is only one way the tip can be inserted.