In their "Try Before Your Buy" episode, the Recon Brothers go over the Sordin Supreme Mil CC Slim & PTT... "The SORDIN Supreme Mil CC Slim is the showpiece of the Swedish SORDIN company (once famously known as MSA SORDIN). In this video we'll fully go over both this headset and the corresponding PTT options as well as cover their builds, features and pro's and con's. Above that, we also show you a few demonstrations to give you a better understanding of what this so called 'active hearing protection' actually does in practice."