Windswept Wyvernplate (Patreon)

Armor (halfplate), rare (requires attunement)

This half plate armor seems to grow lighter when you inhale. You can hold your breath at any point to both lighten the armor and quiet its clattering, negating the normal disadvantage on Dexterity (Stealth) checks imposed by half plate armor.

In addition, if you fall while wearing this armor, you can hold your breath as a reaction to cast the feather fall spell, targeting only yourself, at will.

Blue in the face, but falling with style.