Hypoallergenic silicone rubber gel rich product that will save you from daily noise pollution. It has waterproof, soundproof and bacteria proof. Any sound that prevents us from entering our ears is normal, no matter how loud it is. There is no substitute for earplugs to keep you free from all noise that disturbs sleep or learning. Also useful for earplug sports events, study zones, construction sites, automobile racing, factory hours, sleeping time.