Featuring ergonomic seams and a sweat wicking stretch construction, the richly heathered Columbia Mens Tuk Mountain Short Sleeve Tee is built to help you hike a little farther and run a little longer. During long hours under the sun, the mens Tuk Mountain shields you from harmful UV rays with UPF 50. Fabric is 86% polyester, 12% elastane. Omni Wick pulls moisture away from the body and enables perspiration to evaporate quickly, keeping you dry and comfortable. Omni Shade UPF 50 sun protection. Comfort stretch. Relaxed fit for comfortable range of motion. Center back length 29.