Great seal of memory foam with longevity of silicone.
The foam has real gentle force to push the silicone to the wall of your ear
canal. In this way eartip will pick up the shape of your ear canal. That means ----> tending to perfect isolation.
You need the best isolation to get the most from your earphones.
Symbio will help to you in this.
Soft memory foam lives in perfect symbiosis with flexible and durable silicone.
Symbio.