Featuring an ergonomic design, these earplugs fit snugly in the ear canal, reducing the sensation of foreign objects when worn and effectively reducing noise. With a 3-layer umbrella structure, these earplugs attenuate the impact of sound waves on the eardrum by a factor of 3, thus providing better hearing protection. It is constructed of silica gel material. The length of this product is 2.7cm and the width is 2.5cm. It is suitable for homes, offices, schools, dorms, and so on. Item Name: Soundproof Earplugs Material: Silica Gel Category: Triple Layer Noise Reduction Noise Reduction: 40dB Features: Anti-noise, Perfect Fitting, Comfortable to Wear Size Details: L: 2.7cm/1.06", W: 2.5cm/0.98" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Pair of Soundproof Earplugs