UA Base™ 2.0: Versatile mid-weight layering for cold conditions. Thermal grid fabric traps heat in tiny pockets for long-lasting protection. Quick-dry construction wicks moisture to keep you drier, lighter & more comfortable. 4-way stretch construction moves better in every direction . Anti-odor technology prevents the growth of odor-causing microbes . Wide, flat waistband with a rise that sits just right on your hips. Inseam: 29.5″.