Reposhing this item I purchased from @kwaheed057. Loved it, but ready to rotate for something new. From lululemon: Whatever your pace, this lightweight top will keep up. Scalloped slits on the sides offer ventilation and unrestricted movement, stride after stride. Reflective details make visibility clearer in low light. Lightweight, stretch ripstop fabric is sweat-wicking, quick-drying, and provides UPF 40+ sun protection. Size tag is missing, but I normally wear a 6 and this fit perfectly.