Wear this shirt if you want to stay outside in the sun all day (particularly in, on or around the water) without looking like a boiled crustacean.We've all seen that unfortunate soul who wore a regular cotton tee out in the sun too long and spent the rest of their vacation in agony, missing out on most of the fun. (Might have even happened to you at one time.) Patagonia makes it easy to enjoy a sunny day and protect yourself from feeling like you're almost as crisp as the calamari at your favorite beachside restaurant with their RØ Sun Shirt. Did we also mention how good you'll feel knowing that the fabric is certified as bluesign approved and sewn at a Fair Trade Certified factory (Explained in detail below.) 4.6-oz., 94% polyester (35% recycled)/6% spandex jersey. Imported.The DesignBy utilizing a loose-fitting cut, this shirt promotes cooling airflow over your skin. The self-fabric crewneck rests lightly on your skin, and in combination with the set-in sleeves, ensures chafe-free, next-to-skin comfort that travels well. You'll also find thumb loops that, when worn during activities like stand-up paddleboard and kayak paddling, keep the sleeves from riding up.The FabricThe RØ Sun Shirt is made from a lightweight blend of partially recycled polyester and spandex jersey that helps reduce our need for petroleum to make raw materials and cuts landfill and incinerator waste.50+ UPFThis shirt features a sun protection rating of 50+ UPF (Ultraviolet Protection Factor), which means only 1/50th of the sun's UV rays that fall on the surface will pass through and reach your skin. The sun protection is built-in so, unlike messy sunscreen, it won't wear off or need to be reapplied throughout the day.Polygiene Odor ControlPolygiene permanently protects your garments from smelling like those running shoes you left closed up in your gym bag for a week. Although sweat itself is odorless, it creates the conditions that bacteria need to multiply, and some of those bacteria produce odors. Polygiene permanent odor control stops the growth of the odor-causing bacteria on the fabric, so you can wear your shirt more and wash it less. Polygiene-treated products can be washed at lower temperatures and washed less often, because they can be worn several times between launderings. This is significant because