Under Armour’s Racer Tank uses their HeatGear® technology as the ideal base layer, with the racerback having a super-soft pinhole design to provide breathability to your sportswear, without sacrificing coverage.. Features:. Built with recyclable fabric, free of microplastics that pollute waterways. 4-way stretch construction moves better in every direction. HeatGear® technology to whip away sweat and keep you cool.. Shaped drop-tail hem offers superior back coverage, along with a classic racerback for freedom of movement.. Also available in Blue/White.