Reusable Silicone Ear Plugs - ANBOW Waterproof Hypoallergenic Noise Reduction Earplugs for Sleeping, Swimming, Snoring, Concerts, 32dB Highest NRR, 3 Pairs with Bonus Travel Pouch

not sure though how the strings connect to spare ear plugs.

I tried many types of earplugs (foam, wax) and these are the only ones that fit my narrow ear canals, were comfortable enough to sleep in, and reduced sound. I'm a side sleeper so I trimmed off the stalks as directed, and have no trouble sleeping with them in. Made a positive difference to day sleeping, travel, and when troubled by noise in the night. Have recommended them to family and friends who have had similar positive experiences.

These ear plugs work fantastically. I have small ear canals and other ear plugs would just pop out. You twist these in and they create a vacuum and you can hear very little. I bought these because I am very sensitive to noise especially when going to sleep and could hear my neighbours tv which drove me nuts! These ear plugs completely blocked out the sound and I got to sleep within a few minutes as opposed to the usual hour or more on most occasions. They are so easy to insert (as per video on the listing) and they are comfortable to wear! I'm a side sleeper and these caused no problems as they are soft silicone. The amount of sound the block out is incredible even low frequency sounds but you can still hear your alarm in the morning. I highly recommend these!

Estoy muy satisfecha con mi compra. ¡Son los mejores tapones que he probado! De verdad bloquean el sonido, lo cual me permite leer y dormir mejor cuando los vecinos ponen su música a todo volumen.

Once I cut down the length of protruding handle, very comfortable to sleep on side