Amazon.com: Alpine WorkSafe Construction Earplugs for Adult - Reusable Ear Protection for Work & DIY - Comfortable Hypoallergenic Filter for Noise Reduction - 23dB - with Safety Cord Black : Health & Household
E.A.R. Inc. Do It Yourself Custom Ear Plug Kit (Makes Two Ear Plugs. W/Carry Bag and Detachable Cord) - Do-It-Yourself Custom Molded Ear Plugs