Under Armour Women's ColdGear Infrared Soft, ultra-lightweight fabric delivers superior breathability & incredible comfort ColdGear Infrared uses a soft, thermo-conductive inner coating to absorb & retain your own body heat Signature Moisture Transport System wicks sweat to keep you dry & light Lightweight, 4-way stretch construction improves mobility & maintains shape Flat, yoga-inspired waistband sits just right on your hips