The best base layers for staying warm while you shovel snow, hunt or work outdoors As freezing temperatures persist, base layers are essential for staying warm during outdoor activities and work. Several brands offer effective options, from budget-friendly choices to those designed for heavy-duty use and extreme cold. These base layers focus on trapping heat, wicking away sweat, and providing comfort for all-day wear.

• Fruit of the Loom offers a no-frills thermal underwear set made from a soft, thermal knit fabric that traps heat and wicks sweat.
• Thermajohn’s fleece-lined thermal underwear provides excellent warmth and breathability, ideal for active use.
• Eddie Bauer offers options like a stretchy polyester blend crew neck for women and Ascent tights with UPF 50+ protection.
• Carhartt’s midweight base layer bottoms are designed to trap heat, wick sweat, and prevent odors, suitable for heavy-duty activities.
• L.L. Bean provides a redesigned heavyweight base layer hoodie with soft fabric and a built-in gaiter, as well as midweight women’s pants.
• Smartwool’s Intraknit hoodie, made from merino wool, is designed for extreme cold with ventilation zones and a close fit.
• Under Armour’s HeatGear leggings are lightweight yet effective for cold weather, featuring mesh panels and quick-drying, sweat-wicking fabric.