Food grade quality liquid silicone material liquid silicone, also known as liquid adhesive, has advantages in its good flowability, fast curing, and environmental safety. It fully meets food grade requirements and is mainly used in baby products, medical supplies, and electronic devices. Secure fit with less sound leakage the liquid silicone material is both soft and skin friendly, which allows your ear to naturally relax when wearing the ear tip and allows for extended fatigue free listening sessions. The hs20 has been specially designed for excellent airtightness and surface adhesion. When inserted deep into the ear canal, the ear tip naturally conforms to the shape of the ear canal, thus lessening sound leakage and ensuring high quality sound reaches your ear. Crystal clear sound compared to other types of silicone materials, liquid silicone material achieves both highly transparent sound and a highly transparent look. Its crystal clear water like transparency aesthetic is as refreshing as a natural clear water spring. Improved and denser vocals compared to conventional ear tips, the liquid silicone hs20 features enhanced denser, lusher vocals in a more focused and precise soundstage. Enhanced bass with these ear tips, sub bass is enhanced and bass becomes more textured and higher quality. This allows you to further immerse yourself in the intensity of drum beats.