The silicone eartips of the Free BYRD are made from two different materials: a soft silicone for the Shell and a harder one for the shaft. This makes them very comfortable to wear on the one hand and on the other hand they have a secure fit on the earphones' sound outlets. In addition Different stock colors help the user to easily distinguish all five sizes (XS, S, M, L and XL) from each other.
In addition, three sizes of foam eartips (S, M, L) are included, which offer a firmer fit, for example during sports.