The Under Armour Heatgear Sonic Compression Sleeveless Top is an ultra tight fit to increase muscle power and improve recovery time. Constructed from smooth fabric the top offers a high level of comfort and compression without restricting your movement. Under Armour's Signature Moisture Transport System is designed to wick sweat away from your body so you stay comfortable during a workout. Additional features include anti-odour technology 30+ UPF protection to protect you from the sun and flat lock seam construction. - A.D. Compression: This ultra-tight second-skin fit delivers a locked-in feel that keeps your muscles fresh and your recovery time fast Smooth fabric provides extreme comfort and compression without restriction 4-way stretch fabrication allows greater mobility and maintains shape Signature Moisture Transport System wicks sweat away from the body Anti-odour technology prevents the growth of odour causing microbes 30+ UPF protects your skin from the sun's harmful rays Smooth chafe-free flatlock seam construction Engineered mesh neck