Compression: Ultra-tight, second skin fit Locked-in UA Compression fit makes you feel more powerful Super-light HeatGear® fabric delivers superior coverage without weighing you down Material wicks sweat & dries really fast 4-way stretch construction moves better in every direction Ergonomic flatlock seams deliver a comfortable, chafe-free fit Super-soft elastic waistband with interior wordmark 87% Polyester/13% Elastane