HYPƐAR Sonic Superior PRO are custom-molded music earplugs for in-ear headphones with interchangeable music filters for a natural, evenly damped sound. Designed for demanding listeners, they combine Cavicon™Canal acoustics with a precise, comfortable fit. 2 earplugs equivalent to model Superior but with so-called music filters instead of tube dampers. (The headphones in the image are not included.) Music filters dampen all frequencies approximately equally (see diagram to the left). The result is a natural sound image both from outside and in the headphones. The music filters can be replaced with plugs (which you buy separately) for max damping. (With a pair of plugs you get the same function as model Budget and Basic.) Design: Cavicon™Canal; freeform sound channel that follows the outer shape for optimal sound quality and comfort. Damping channel for TuneSound™PRO System. Connection adapted to your existing In-Ear headphones/headsets. Material: Skin-friendly silicone Color: Transparent Surface treatment: Skin-friendly anti-bacterial silicone lacquer (transparent) Marking: Right 'R' and Left 'L' Hardness: 25, 40, 60 or 70 Shore A