These are your basic foam earplugs. Not fancy but in a pinch, you’ll be happy you have them. With a noise-reduction rating just below the big-gun ear defenders (NRR 29), these may not block or reduce all the sounds you want but they will help when you need it.
To use, roll between fingers then insert. When they expand and fill the ear canal is when they’re doing their job.
Soft for sleep and extended use but safety first: Never insert anything deep into the ear and never, ever anything that isn’t clean.
Grab your keys and tuck a clean pair into your pocket when you leave the house. Easy peasy.