A basic sewing kit. Required to craft and repair clothing.
In-game description

A tool that is required for repairing clothing.

A sewing kit cannot be repaired or harvested.

Fishing tackle can also be used to repair clothing with the same effectiveness, and can be fairly easily created at the crafting bench late-game.

The sewing kit is packaged as a product named Ace Mending Kit.

Fishing Fishing tackleHookLantern fuelLine
Harvesting Improvised hatchetImprovised knifeSnare
Other Bear skin bedrollSurvival bowTorch
Ammunition Flare shellRifle ammunitionSimple arrow
Fire starters AccelerantCardboard matchesFirestrikerMagnifying lensWood matches
Harvesting HacksawHatchetHeavy hammerHunting knife
Light FlareFlashlightStorm lantern
Repair Quality toolsRifle cleaning kitSewing kitSimple toolsWhetstone
Weapons Distress pistolHunting rifleStone
Other BedrollBolt cuttersCan openerJerry canPrybarMountaineering rope