Fangrui Product Details 1. Memory Foam Earplugs Student Dormitory Sleeping Noise Reduction Soundproof Earplugs 2. Material: Pu Polyurethane 3. Selected Skin-friendly Polyurethane Material, Soft And Comfortable To The Touch, Long Wearing Ears Without Swelling And Pain 4. Internal Micro-bubble Holes Design, To Ensure The Air Permeability Of The Inner Ear Canal, And Effectively Enhance The Noise Reduction Effect 5. Warm Memory Foam, 60 Seconds Slow Rebound, Will Be Shaped According To The Temperature Of The Ear Canal To Adapt To The Contours Of The Ear Canal 6. Wear Instantly Quiet, Help You Sleep Deeply, Surface Stained With A Little Dust Or Foreign Matter, Wash And Dry Can Be 7. Weight: 10pcsbox About 19g, 24pcsbox About 30g, 60pcsbox About 70g, 120pcsbox About 98g 8. Wearing Method: 9. Using The Index Finger And Thumb To Rub The Ear Plugs Into A Thin Strip, The Thinner The Better 10. Lift The Ear Upward Gently And Rotate The Earplug Into The Ear Tactfully 11. Fix The Earplugs With Your Index Finger For 30 Seconds Until The Earplugs Are Fully Inflated