This two-hour EVA will see the mission crew donning the EVA suits before the Dragon spacecraft is depressurized. After this, commander Isaacman and mission specialist Gillis will egress the vehicle’s forward hatch and perform a tethered spacewalk. In addition to the new suits, the Dragon spacecraft has been appropriately modified to support this mission profile.

I still find it incredible that they’ve come up with a plan to depressurize and repressurize an entire Dragon. If it works well, this could enable missions which haven’t been possible since the Shuttle days.