3M™ 1100 earplugs with storage box are slow-recovery polyurethane foam tapered earplugs. They are disposable, very lightweight (13g), and reduce noise levels up to 37 dB. Easy to use and install; the tapered design fits most ear canals. All-day comfort - soft, hypoallergenic memory foam. Disposable. Smooth, dirt-resistant surface enhances hygiene, durability, and comfort. The soft polyurethane foam is hypoallergenic. Very lightweight, weighing only 13g. Reduces noise levels up to 37 dB.