Precautions for Use: Do not put the ear and case into your mouth (especially for small children. Please do not use for diving or high jumping.(Water pressure may cause the ear spots to enter into the back of the ear and it may be difficult to fall out. If you have ear ailments, please consult a specialist before using. Stop use and consult a physician if you experience inflammation, rash, itchy, swelling, or irritation. In addition to swimming, various water sports, shower, hair washing, etc., it can also be used for soundproofing. After use, wash with tap water and dry thoroughly and store in the case.To remove dirt from earplugs and cases, wash with mild detergent, rinse thoroughly with tap water and dry in the shade.