Otifleks Large Flier Earplugs are designed with a pressure equalizing micro filter which slowly equalizes pressure on both sides of the earplug and prevents pain caused by pressure changes. Utilising the latest findings in ergonomic design and harnessing the power of thermo – reactive elastomer, the minimalist size of the leads to maximized comfort, blocking sound whilst you sleep on your flight. Designed to block noise (SNR 17). Unique micro – filter reacts to pressure changes to alleviate discomfort. Suitable for all stages of air travel (take off, flying and landing).