ISO-Ultras are solid-fill custom-fit silicone ear plugs designed to provide maximum protection and isolation for industrial applications, construction, shooting, motorsports, and other high-noise environments.Note: Custom-fit products take 6-8 weeks to manufacture. WHY CUSTOM EARPLUGS? The shape of your ears is as unique as a fingerprint. Using state of the art 3D printing technology, we can create custom molded earplugs perfectly sculpted to the exact shape of your ears for all-day comfort and maximum noise isolation. MEDICAL-GRADE MATERIALS Our custom molded earplugs are made of high-quality, biocompatible, medical-grade silicone that is safe for long periods of direct contact with the skin for complete peace of mind. COMFORTABLE, SECURE, AND PORTABLE Featuring a full-shell design, ISO-Ultras are perfectly sculpted to the exact shape of your entire ear for an extremely secure fit that maximizes noise isolation. ISO-Ultras provide a more portable and convenient solution for situations where over-the-ear earmuffs may otherwise be needed. MAXIMUM HEARING PROTECTION ISO-Ultras are completely solid all of the way through, providing noise reduction of up to 35 dB. ISO-Ultras are perfect for extremely loud environments such as gun ranges, motor speedways, and construction sites.