I would recommend our Best earplugs for swimming with grommets or our Alpine Pluggies reusable Ear Plugs.
Aside from quality, earplugs come down to personal preference/comfort. Our best earplugs for swimming with grommets do a great job at making the ear canal watertight.
The Soft Silicone is moldable to your little ‘ shape ones’ shape out the ear canal and isis a disposable earplug – although you can get around 5 wears per pair, and there are 6 pairs per package. The Alpine Pluggies are reusable.
Earasers earplugs are of good quality, you and your kids may like. Some parents prefer the Alpine Pluggies if they are not going to be around to help their child insert and or remove the earplugs. Often kids find the Alpine a lot easier when it comes time for this.
Both have a little carry case to keep them safe after use and stored safely in his swim bag.
Your son can wear either earplug for hearing protection. He may also be subject to loud surroundings/noise like fireworks, motorcycle, car racing events, music festivals, etc.