The Real Risks of Heated Clothes and Hand Warmers
Battery-powered socks, insoles, hand warmers, and vests can offer instant warmth in freezing temperatures. Yet, some of these items have caused burns and even fires, resulting in recent recalls. This week, Wirecutter outdoor gear writer Kyle Fitzgerald explains what you should know about heated gear, and how to avoid riskier products. He walks us through the safety certifications to look for, why you should only buy from a trusted brand, and what to know about traveling with battery-operated clothing. Plus, he shares classic layering principles and Wirecutter’s top-tested winter gear to keep your core, hands, and feet warm on the coldest days. This episode covers:How to spot safety risks in battery-powered gear: Lithium-ion battery issues like bulging, discoloration, or an unusual electrical odor indicate a problem. Stop using the product if you see these signs. What safety certifications to check for: Verify that heated apparel has a mark from an OSHA-recognized Nationally Recognized Testing Laboratory program (NRTL) or through UL before buying, and steer clear of unverified "alphabet soup" brands.How to charge and care for heated apparel safely: Charge batteries in open view, avoid leaving them plugged in overnight, never wash garments with batteries attached, and keep lithium-ion packs out of checked airline luggage.How to layer effectively without batteries: Master the three-layer system—moisture-wicking merino wool base layers, air-trapping down or fleece mid-layers, and weather-protective outer shells—to stay warm naturally.How to protect cold hands and feet: Choose mittens over gloves for better heat retention, and pair heavyweight merino or alpaca wool socks with insulated winter boots. Products we recommend: The best ski and snowboard gloves: Black Diamond Guide GlovesFloofy foot nests: Tabio Extremely Warm Alpaca-Merino Lounge Socks (unisex) Additional reading:Heated Gear Keeps Catching on Fire. How Can You Know What’s Safe?The 3 Best Hand Warmers of 2026The 7 Best Insulated Vests of 202635 Best Socks of 2026The Best Winter Boots
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