"These old trousers are threadbare in spots, but they're surprisingly comfortable. The legs are a bit short, though."
--In-Game Description
The Well-Worn Trousers are leg armor that appears in The Legend of Zelda: Breath of the Wild. Link can find it, along with the Old Shirt, in a treasure chest in the Shrine of Resurrection immediately after awakening from his one-hundred year slumber. It's part of the Worn Set and has a defense of 1 when worn by itself.
Locations[]
The Well-Worn Trousers can be found in a treasure chest in the Shrine of Resurrection immediately after starting the game for the first time, along with the Old Shirt.
After the "From the Ground Up" side-quest is completed, it can be purchase from the Rare Armor Shop in Tarrey Town, which will allow Link to reacquire it if he sold it early on in the game.