QUAD® REUSABLE EARPLUGS Features Sound Management Technology, design reduces low and mid frequencies while higher frequencies [communication, signals, alarms] are heard with less distortion. This earplug is light, comfortable, and easy to use, making it ideal for workers in a variety of industrial and commercial applications. Recommended for medium-level noise (95 dBA TWA). It enhances communication while preventing isolation from the environment, making it ideal for noise levels below 95 dB. The patented quad design provides a secure seal in the ear canal for all-day comfort. Designed for personal comfort and safety, it is soft, and the special woven cord reduces sound transmission. The multi-channel earplugs remain securely in place in the ear canal. It provides excellent comfort and a truly personal fit. The special carrying case ensures hygienic storage between uses. The earplugs are washable and reusable. All BBU® products and packaging are made without PVC for a greener alternative.