1. Silicone material, durable, non-toxic, no peculiar smell, no irritation to human body, no allergic reaction 2. Wearing soft and comfortable, with stronger sound insulation effect 3. Equipped with a pressure relief hole for a tight fit and enhanced noise reduction. 4. Packed in cardboard to prevent loss. 5. Note: This package only includes earplugs, no other. Cleaning brush color is shipped randomly.
