The Moldex 6609 Sparkplugs come corded so that they can be hung around the neck when not in use. Earplugs without cords might be dropped on the floor and wasted, or stuck in dirty, unhygienic pockets when not in use. Eliminate this issue with these Corded Sparkplugs. The Sparkplugs feature the highest independently tested NRR 33. Workers will be attracted to the sleek camo green colors and want to wear these Sparkplugs.