The Women's Arc'teryx Olia Short-Sleeve Button-Up Shirt is a breathable top for hiking. Constructed of a durable blend of nylon and elastane, it holds up against brushes with nature, plus stretches so it won't restrict movement. The UPF 50+ sun protection shields against harmful rays, so you can hike for longer. The concealed snap buttons and collar provide a clean look when stepping off the trail and into town for restocking and a bite to eat.