Make sure you stay comfortable in warm conditions by putting on the Columbia Sportswear Women's Chill River Tank II. This tank top is made of 89% polyester and 11% elastane with Omni-Wickâ⢠technology to keep you dry in the heat, and its Omni-Shadeâ⢠Broad Spectrum UPF 50 sun protection means you'll be safe on sunny days. Columbia Sportswear Women's Chill River Tank II Navy Blue, Large - Women's Outdoor Short-Sleeve Tops at Academy Sports