3M™ E-A-R™ soft, Yellow Neons Earplugs, Refill Bottle - 500 PairsKey Features SNR 34 dB Higher L value of HML data, provides a better attenuation at low frequencies (< 500Hz) Slow recovery foam helps to make the insertion easier Soft pliable foam conforms to the shape of the ear canal for better comfort and all day wearability Vibrant colour neon yellow colour for hearing protection compliance sighting Compatible with the 3M E A Rfit Dual Ear Validation System What's in the box 3M E A Rsoft, Yellow Neons Earplugs,