Smart Fit Yellow Corded Earplugs are made with a triple-flange design to help contour to the different shapes and sizes of ear canals. Designed to used in noise up to 100 dB (A) criterion. It helps create a noise-blocking seal. With 25 Decibel Noise Reduction Rating (NRR), workers can insert the triple flanged ear tips easily and comfortably into their ears by holding the stem and pushing the ear tips into the ears. Pliable material can be washed and reused, cutting down costs and extending the hearing protector's life. The ear plugs are easy to roll down and insert, then expand within the ear canal for a comfortable, secure fit. Recommended applications include assembly and mechanical, chipping, chiseling, cleaning, drilling, furnace operations, grinding, heavy equipment operations, machining, metal repair, painting, pouring/casting, power fastening, riveting, sanding, sawing and welding. This earplug is packed 50 pairs, which is further packed 1 pair in a sealed nylon for hygenic and safety. Wear properly for maximum result. This ear plug is commonly used in a high noise prone sectors such as airports, agricultural activities, factories, manufacturing industries, construction, healthcare, oil and gas, etc. These ear plugs have a Noise Reduction Rating (NRR) of 25 Decibel. Ear plugs are made of a ABS/Elastomeric Polymer.