"3M™ E-A-R™ Classic™ Earplugs set the standard in hearing protection as the world's first foam earplugs. Slow recovery, low pressure foam conforms to the shape of the ear canal for enhanced comfort and wearability. Moisture-resistant—helps maintain a consistent expansion time, even in humid environments. Flame resistant—important for potential arc flash situations and for storage considerations." -3M
Online Store (Amazon); https://www.amazon.com/gp/product/B07S51HQM9/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B07S51HQM9&linkCode=as2&tag=madeinusare0c-20&linkId=977dbc9919199c8071125cd677a1ec37
Online Store (EBay); http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575539685&toolid=10001&campid=5338598986&customid=&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F3M-E-A-R-Classic-Ear-Plugs-Noise-Reduction-29dB-Yellow-Foam-Disposable-10-PACK%2F192127096473%3F_trkparms%3Daid%253D333200%2526algo%253DCOMP.MBE%2526ao%253D1%2526asc%253D20171012094517%2526meid%253De69b046a32f54f5db1fe8439c4d82d88%2526pid%253D100008%2526rk%253D3%2526rkt%253D12%2526sd%253D192127099952%2526itm%253D192127096473%2526pmt%253D1%2526noa%253D0%2526pg%253D2047675%26_trksid%3Dp2047675.c100008.m2219
Product Review; "Whether at the shooting range or just trying to get a good night's sleep amongst a noisy neighborhood, E-A-R Classics are comfortable and dependable. Roll-up and squeeze firmly into ear and you're protected from hearing damage, then easily dispose (or clean for reuse) - either way they're cheap and really do the job - A hobbyist and professional favorite."