According to use
Each ear plug is used for a different purpose. Whether it is reusable or disposable.
Everything is designed to fit the situation and to meet high quality standards, so that your hearing is protected and your ears are kept safe.
3M MRX21AWS5 ALERT XP WS5
High Fidelity 20 dB musician earplugs in two sizes, for kids and adults
Ear plugs with cord: ideal for multi-purpose use. Moldex reusable hearing protection
QUIES green or pink children’s ear defenders