The Ninja Suit is a full-body covering introduced as a promotional Twitch drop during the World Revamp patch in May 2021. It has a unique appearance, completely dissimilar to any other in-game skin that makes the wearer resemble a ninja clad in full black garb.
From a defensive use perspective, it is a direct statistical match to the Surgeon Scrubs. The primary difference between the two, aside from appearance, is that you don’t need a tier 1 workbench to craft the Ninja Suit. The waterproof nature of both outfits, alongside their relatively high radiation resistance, makes them ideal wipe day attire.
While the Ninja Suit steam item can no longer be acquired by players that missed the Twitch Drop event, those that did get it may craft it at any time throughout the year. For those that missed it, the Surgeon Scrubs are tradable, but arguably not as cool looking.