Construction, Materials, and Comfort: For starters, the protein leather is extremely soft and supple, and makes the ear pads and headband luxurious to touch.  Heat retention actually isn't as bad as I was expecting, and wearing the headphones in a 80+ degree room wasn't as bad as I'd feared. Still warm, but definitely bearable (and comfortable if it's cooler or you have a fan).  The hinges and size adjustment feel solid, and seem durable enough.  The pair I have are from the loaner program, and they still feel new to me.  I have a big head (I...