This Christmas tree earplugs made of silicone, link with a thread so that, it won't be easy losed. It provides Max noise reduction for the peace, quiet, and sleep you deserve! Used when you are swimming, to protect your ears. Earplugs can be washed with basic soap and warm water and re-used multiple times. Each pair is sealed in its own Sealed aluminum can for good sanitation. They are easy to keep at work, in the car, purse, backpack without getting dirty. 2 1/2" L x 27/32" W.