String is a crafting component in The Witcher 3: Wild Hunt that can be dismantled into thread. It is needed to craft many armor items.

It can be found as random loot or purchased from the following merchants:

• All armorers and blacksmiths, except the one at Ardaiso Quarry
• Armors and weapons merchants in Nilfgaardian Army Group 'Center' Camp
• Fish merchant in Hierarch Square
• Merchant in the boatyard south of Refugees' Camp
• Merchant at Calveit Watchtower
• Merchant at Coast of Wrecks
• Merchant in Putrid Grove
• Merchant in the Road to Bald Mountain village
• Merchant in Ursten
• Merchant by the road west of White Eagle Fort
• Moving merchant in Blackbough, near Carsten or south of Gate of the Hierarch
• Scoia'tael merchant in the forest south of Novigrad
• Scoia'tael merchant in the forest east of Oxenfurt
• Quartermaster Eggebracht in Nilfgaardian Army Group 'Center' Camp
• Merchant in Blandare
• Merchant in Fyresdal
• Merchant in Holmstein's Port
• Merchant in Larvik
• Merchant at the sawmill northeast of Rannvaig
• Merchant at the Isolated Hut on Hindarsfjall
• Merchant in Svorlag
• Sjusta in Kaer Trolde Harbor
• Merchant in Mohrin Village
• Merchant in Stacheier
• Clerk in Villa Vedette
• Merchant outside the The Cockatrice Inn
• Merchant in Dupont & Sons
• Merchant in Flovive
• Merchant in Francollarts
• Merchant in The Clever Clogs Tavern
• Merchant in the Wine Market in San Sebastian
• Pierre in the Tailor's Workshop in Beauclair
• Wandering merchants in Toussaint
• Wine Merchant at Rivecalme Storehouse

String can also be obtained by dismantling many items, most of them armor pieces. The full list of items is too long, but the following are all non-crafted items from the base game:

Needed to craft

Witcher gear:

Other items: