What Our Gearhead(R) Experts Are Saying:"I've been wearing the Sereno Polo Shirt on warmer days when I need something that looks a little more pulled together without sacrificing any comfort. The Naia blend wicks heat and sweat faster than a standard poly polo, and the straight hem means I can wear it untucked and it still looks intentional enough for a post-hike dinner."The Sereno Polo Shirt from Marmot sits at the easy intersection of looking good and feeling better, built from a lightweight recycled polyester and Naia(TM) cellulose acetate blend that breathes, wicks, and stretches through whatever the day brings. The collared button closure keeps things sharp enough for wherever the afternoon leads, the straight hem wears cleanly untucked, and the knit construction stays cool and comfortable even when the temperature doesn't cooperate.