3M : ที่ครอบหู PELTOR™ Optime™ 98 รุ่น H9A แบบครอบศีรษะ 10 ชิ้น/กล่อง

这款头戴式耳罩采用不锈钢头带，提供均匀压力并有效隔音。耳罩配有液体和泡沫垫，确保长时间佩戴舒适且密封良好。

• The description claims a noise reduction rating (NRR) of 25 dB.
• The description claims the product can handle up to 98 dBA sound levels.
• The description claims the stainless steel structure is durable against bending and deformation.
• The description claims the NRR value may exceed typical usage protection levels and recommends reducing it by 50%.