Nike Lax Reversible Mesh Tank - Men's Get your blood pumping in the Nike LAX Reversible Mesh Tank. This reversible lacrosse knit mesh tank is perfect for practice or training with the two-color design. A Nike Team Sports jock tag and embroidered Swoosh let you know you are running with the top outfitter in the game! Outer: 100% nylon. Inner 100% polyester. Imported.