Get smart: a truly tailored fit ensures superior comfort. Embedded Conforming Material Technology senses body heat to conform precisely to the wearer’s ear canal shape and size. Three-flange tip creates an excellent noise-protection barrier. Fit-almost-everyone system enables one-product, one-order inventory control. Corded/Cordless: Corded; Shape: Flanged; Materials: CMT Polymer; Noise Reduction Rate NRR: 25 dB.