Heavy duty hand coverings that extend part way up the arm. Leather outers and wool liners. Warm and tough, just like you want to be.
In-game description

Gauntlets are a type of clothing in The Long Dark.

Gauntlets provide the highest warmth bonus of any pair of naturally spawning gloves. Unfortunately, they also have the worst warmth-to-weight ratio (tied with rabbitskin mitts and ski gloves). Gauntlets have nearly identical stats to the rabbitskin mitts, but need cured leather for repair.

Gauntlets tend to be rather rare.

Can find it in Old Spence Family Homestead in Forlorn Muskeg.

Random house in Milton Town.

Hats and scarfs BalaclavaBaseball capCotton scarfCotton toqueFleece cowlLong wool scarfWool scarfWool toque
Gloves Driving glovesFleece mittensGauntletsRabbitskin mittsSki glovesWool mittensWork gloves
Shirts and sweaters Cowichan sweaterDress shirtFisherman's sweaterHoodiePlaid shirtSweatshirtThick wool sweaterThin wool sweaterT-ShirtWool shirt
Coats, vests and jackets Bearskin coatDown vestExpedition parkaLight shellMackinaw jacketMariner's pea coatMilitary coatMoose-hide cloakOld fashioned parkaSimple parkaSki jacketSport vestUrban parkaWindbreakerWolfskin coat
Underwear Thermal underwearWool longjohns
Pants Cargo pantsCombat pantsDeerskin pantsJeansSnow pantsWork pants
Socks Climbing socksSports socksWool socks
Shoes and boots Combat bootsDeerskin bootsInsulated bootsLeather shoesMukluksRunning shoesSki bootsTrail bootsWork boots
Accessories Moose-hide satchelWool ear wrap
Italics denote craftable clothing items.