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.

Cooking Can openerCooking potRecycled can
Fire Starting
Starter FirestrikerMagnifying lens
Accelerant AccelerantJerry canLantern fuel
Ice Fishing Fishing tackleHookLine
Hand Tools
Standard HacksawHatchetHeavy hammerHunting knifePrybar
Improvised Improvised hatchetImprovised knife
Weapon Distress pistolHunting rifleRevolverSurvival bowStone
Ammunition Flare shellRevolver ammunitionRifle roundSimple arrow
Lighting FlareFlashlightStorm lanternTorch
Mending Quality toolsRifle cleaning kitSewing kitSimple toolsWhetstone
Sleep Bear skin bedrollBedroll
Story Jeremiah's knifeScrap metal shard
Other CharcoalMountaineering ropeSnare