With HD 300 Pros it’s clear that Sennheiser chose good sound isolation over long session comfort. While the headband cushions and ear pads feel rather soft and comfy at first, none of our testers found them a suitable option for extended mixing sessions, and that comes as no surprise, given how strong the clamping force is. But don’t be discouraged if you’re looking at HD 300 Pros as recording headphones, the comfort is ok for tracking duties