Yes! They're the best. I've been using them for over 40 years. Pro tip: buy the bright orange kids' size: they fit more comfortably without having to be customized and they're much easier to locate when they (inevitably) fall out and disappear. Plus you get twice as many for your money.

https://www.amazon.com/Macks-Moldable-Silicone-Putty-Plugs/d...