Your first order of our custom-molded products must always be supplemented with 3D scanning of your ears (New), ear impressions or another custom-molded product you already have. See www.hypear.com for more information. 2 earplugs equivalent to model Basic but with damping channel for TuneSound™System and Cavicon™Canal sound channel. (The headphones in the image are not included.) Tube filters dampen high frequencies more than low. The smaller hole diameter, the more and even damping of the environment. At the same time, the bass becomes fuller. Best suited for communication (Headsets). For best sound quality (music), you should choose the Superior PRO model. The tube filters can be replaced with tube plugs (which you buy separately) for max damping. (With a pair of tube 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™System. Connection adapted to your existing In-Ear headphones/headsets. Material: Skin-friendly silicone Hardness: 40 Shore A Surface treatment: Skin-friendly anti-bacterial silicone lacquer (transparent) Marking: Right 'R' and Left 'L' Color choice: Transparent, black, red, white (60 Shore A), neon colors (green, yellow, orange, pink)