..every instructor I've spoke with told me to buy MSA Sordins. I have issues with my hearing so I can't be in a class setting with my hearing protection on and hear the RSO or instructors if there any background noise. After looking for weeks, someone told me about Botch's deal on the MSA Sordins. Here is an unboxing video and explanation of where I got them. Available in 1080p Please rate and Sub. It helps me make more videos and get more views.