REI Co-op Sahara Solid Long-Sleeve Shirt - Women's Sz L Color- Lavender Made of cool, moisture-wicking stretch nylon—now bluesign®-approved UPF 50 sun protection Convertible sleeves roll up and secure with button tabs Back vent has a mesh yoke underlay to help keep you cool Side and underarm inset panels provide more comfort and ease of movement Chest pockets have hidden hook-and-loop closure Secure zip pocket at left side seam so stash cash or other small necessities Sunglass keeper loop at left chest pocket bluesign®-approved materials which materials conserve resources and protect the health of the environment, workers and wearer (you!)