The medium Comply Canal Tips from SureFire are disposable replacement tips for the SureFire EP7 Sonic Defenders Ultra earplugs. They feature tapered ends and are made of soft and comfortable memory foam. The body heat-activated foam allows them to conform to the ear canal and creates a solid acoustic seal for the maximum amount of protection. A flexible threaded core makes installation and removal easy, and the threads ensure that the tips stay secure on the stems. These removable and disposable tips save money and waste, since there is no need to replace the entire earplug when they get worn out or dirty.