"Not sure I believe you," Stark said.

"Thank you. The mask is, it-" he frowned and started over. "Without the mask I have to concentrate on-" he waved a hand at his now scarf-covered face. "It can be too much, if I'm not careful. Gets tiring. Have to hold myself together." He'd almost died again from not having it for a while after he came back from being executed but was wisely choosing not to share that minor detail at this time.