Young people in particular, but not exclusively, expose their ears to excessive noise (concerts, nightclubs, parties...). But, we have a hearing ability that must be preserved and maintained throughout our lives. It is therefore important to wear hearing protection in certain situations!
Wearing ear plugs is essential is all situations exceeding 85 d: concerts, nightclubs, certain professional activites, gardening, DIY, music...
To this purpose, there are wax ear plugs (the famous "Quies protective balls") and the foam earplug which is shaped between the fingres before inserting into the ear canal where it dilates. Silicone ear plugs (sometimes in rubber), they are preshaped and adapted to the shape of the ear canal.
These protections against noice can be singe-use or may be used several times.