1. The housing is a three-layer structure (the outer casing/inner casing/cover is integrally formed)
2. The actual sound insulation decibel can reach more than 30DB. (values that can be reached by layer 3)
3. The earmuffs are completely glued without any glue. (no possibility of any toxic substances)
4. The product has passed all EU environmental testing certifications. (All materials are made of new materials, without any recycled materials)
