Under Armour Mens Spine Gameday Short Sleeve Shirt Black/Carbon Heather/Silver REGULAR A slimmer athletic cut that delivers better mobility by eliminating the bulk of extra fabric HeatGear Sonic fabric is ultra-soft & smooth for extreme comfort with very little weight Stretch-mesh back panel provides strategic ventilation 4-Way Stretch fabrication allows greater mobility & maintains shape Moisture Transport System wicks sweat away from the body