To unlock the Shadow of the Tomb Raider Manko outfit, you'll need to work your way to the Hidden City. You'll want to travel to the lake that's situated to the South West of the howling wolf image on your map. Once there, you'll need to head to the North East side of that lake, and use your rope arrow ability to cross the body of water and enter the crypt. Once inside, complete the tasks within the crypt and you'll earn the materials that you need to craft the Shadow of the Tomb Raider Manko outfit.

The Shadow of the Tomb Raider Manko outfit gives Lara two boosts. Equipping the upper body part allows you to close in on animal prey more efficiently, as it takes them longer to sense that Lara is nearby. The lower body portion of the Shadow of the Tomb Raider Manko outfit gives Lara more XP points for non-stealth kills. If your play style is more suited to gung-ho approaches than patience, you may want to equip these trousers.