Description Protect your hearing without interfering with your ability to hear routine sounds or conversations. Double-flange stem design fits most people and provides a 24dB Noise Reduction Rating. Hear safe level sounds. Include attached stopper plugs which can be inserted for further protection, which block out lower level sounds like that heard on an airplane. Made from soft but durable, hypoallergenic polymer and ergonomically shaped, with adjustable stem design. Low profile design. Size refers only to the outer earpieces that fit in the ear's concha bowl; the portion that fits in the ear canal are identical in all sizes. Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.