Keep cool during dynamic aerobic activity in warm weather conditions with the Columbia Men's Zero Rules Long-Sleeve Shirt. Industry-leading Omni-Freeze ZERO super-cooling technology reacts with your sweat to lower the temperature of the fabric and your body. Soft, lightweight interlock fabric with comfort stretch gives this performance long-sleeve maximum ease of movement. Omni-Wick technology pulls moisture away from the body so sweat can evaporate quickly, along with an antimicrobial treatment that helps reduce odor so you stay fresher longer. Omni-Shade UPF 30 sun protection helps shield your skin against harmful UV rays. Modern Classic fit. Center back length: 28". Imported.