EAR MUFF 1.CE certificate 1.Adopts the folding design 2.Big cover body,No earache after long term wearing 3. NNR:23db EAR MUFF1. Adopts the folding design,convienient to carry and store.2. Big cover body,no earache after wearing for a long time.3. Reduce noise effectively4. EN352-1 2001 STANDARD5. CE approval.