Best For Maximum Mobility: UA Outdoor Cargo Leggings
With winter sportswear, sometimes you have to sacrifice mobility for warmth. That's fortunately not the case with these UA Outdoor Cargo Leggings ($65). Because they're constructed with Under Armour's special ColdGear fabric, they keep you nice and warm, but they're also lightweight and stretchy so you can work out as you would in any pair of leggings.