The special acoustic filters in the WorkSafe earplugs offer extra strong noise reduction values that shield you from damaging noise levels produced by tools and machinery. Noise is reduced to safe levels that you can easily bear for eight hours at a stretch. The filters allow for normal conversation and make sure you are alerted to all safety signals. WorkSafe earplugs are made from Alpine's proprietary AlpineThermoShape material, which moulds to the shape of your ear canal. This enables perfect noise reduction without pressure or feeling cut off from what is happening around you. The material is hypoallergenic and silicone-free, so you won't suffer from itching or irritations while working.